ࡱ> ikfgh'` Lbjbj$$ FF+ vvv(w<w(`yy(yyyzzz|~~~;$h{zz{{yy{6yy|{|j,yy ~`v|N2|0(v ~vdvz"zzzzzz^zzz({{{{;B4B CHAPTER 20 SYSTEMS DESIGN, IMPLEMENTATION, AND OPERATION SUGGESTED ANSWERS TO DISCUSSION QUESTIONS 20.1 The consulting team should advise the president that postponing the establishment of standards and controls is not advisable. Rather than save time and money the company will probably lose time in the future when unanticipated problems and weaknesses arise due to the lack of standards and controls. The following are reasons why performance standards and control procedures should be established before the system becomes operational: Internal control considerations must be taken into account when assigning job responsibilities. Job descriptions and work schedules must provide for the execution of the various control procedures. The performance standards connected with each position must be considered when selecting personnel to operate the system. Documentation standards and data security provisions must be formulated. Error checks must be built into all computer software systems. Procedures for guiding the users and operators through the system and the various error conditions must be established before the users and operators begin working with the new system. If the information system is not properly controlled, the information it produces will be of little value. Therefore, controls must be built into the system to ensure its effectiveness, efficiency, and accuracy. 20.2 The following are recommended responses to each of the five areas: a. Personnel: The employees will be affected in at least two important ways. First, they may be reluctant to accept the new system. They may fear for their jobs, feel as if they are no longer vital components of the organization, or they may completely reject the new system and refuse to utilize it. Second, the employees will have to learn new policies and procedures to work with the new system. Initially, this may cause a slight reduction of overall productivity as the employees learn the system. b. Data Storage: One of the primary logistical concerns of implementing a new system is making the required data accessible to the new system. This often requires that files be converted to new formats and that the company's data bases are restructured to accommodate the new system's information requirements. In addition, new sources of input may be required which will increase the need for employee instruction and training. c. Operations: New personnel may have to be hired or current employees may need to be trained to run the new system. In addition, the users of the system will have to adjust to new types of input and output associated with the system. Finally, the company as a whole will be affected by changes in employee morale and productivity until the personnel are accustomed to and proficient with the system. d. Policies and Procedures: A new information system almost always requires that new operating policies and procedures be implemented. These include data security and control, error checking, documentation, backup and recovery procedures, and file maintenance, among others. These new policies and procedures should be disseminated to the employees before the actual conversion takes place to ensure that the employees are aware of the new requirements and to facilitate the actual system conversion. e. Physical Facilities: The effect on the physical facilities will be largely determined by the size and nature of the system being installed. For example, a micro- or minicomputer will only require a desk or perhaps a small room, whereas a mainframe may require a large facility. In any event, the company will need to be concerned about physical access to the system; off-site backup and recovery procedures; protection from fire, flooding, and other disasters; office space for programmers and operators; lighting, air conditioning, and humidity control; and data communications facilities. 20.3 This approach is clearly unproductive and would not work. The possible repercussions of this action include the following: Sabotage of the new system by disgruntled employees. Employees not released will probably harbor ill feelings towards the company. Employees will reflect these feelings through poor work performance, lower productivity, higher absentee rates, and resentment towards the new system. Management should have discussed the situation in person with each employee. The changes that were being made should have been clearly communicated with each employee. Every effort should have been made to relocate the employees within the company and offer early retirement where possible. Employees that were being terminated should have been told in person. Giving employees a week's notice that they are "being replaced by a computer" may well result in the system being sabotaged. Therefore, employees should be terminated on Friday afternoon and given the appropriate severance pay. However, the termination should not come as a complete surprise to the employees. The employees should have already known that every effort was made to relocate them within the company and that termination was a last resort. 20.4 a. The managerial accountant is usually involved in the analysis phase as designers assess their needs as users. The project development team may also ask the accountant to help with an economic feasibility analysis. In addition, the accountant may also assist in the design phases setting design formats for possible reports. b. Most of the programmer's involvement comes during the physical design and the implementation and conversion phases-coding, testing, and debugging computer programs. The programmer is also involved with the maintenance phase, making modifications to the system and fixing bugs. c. The analyst is usually involved in all phases of the SDLC. d. The financial vice-president is usually involved in the systems analysis phase. However, as a member of the steering committee the financial VP will oversee all phases of the SDLC. e. The IS manager is responsible for overseeing all information systems activities. Accordingly he or she will be involved in all phases of the SDLC. f. The auditor is often consulted during the systems analysis phase of a project to determine security measures and controls for the new system. During the design phase, the auditor will often test controls to insure their adequacy. The operation and maintenance phase lasts indefinitely and it is during this phase that the auditor conducts his routine audit tests. 20.5 a. Physical (detailed) systems design phase and Implementation and conversion phase b. Physical (detailed) systems design phase and Implementation and conversion phase c. Conceptual (general) systems design phase d. Conceptual (general) systems design phase e. Conceptual (general) systems design phase f. Implementation and conversion phase g. Implementation and conversion phase and Operation and maintenance phase h. Systems analysis I. Operation and maintenance j. Operation and maintenance k. This can be done in all phases, but is most likely in the first (systems analysis) and last (Operation and maintenance). l. Feasibility tests are conducted at all phases of the SDLC. m. Systems analysis phase SUGGESTED ANSWERS TO THE PROBLEMS 20.1 Adapted from the SMAC exam. a. Anyone would follow the following procedures to design and implement a new AIS: Systems analysis (initial investigation, systems survey, feasibility study, and determining information needs and system requirements) conceptual design physical design implementation of the system operate and maintain the system 1. Sources of Information review company documents such as organization charts, job descriptions, and procedure manuals current system's outputs, reports, and documentation interview users and management observation of the current procedures 2. Methods of Recording Information preparation of narrative descriptions preparation of organization charts preparation of data flow diagrams preparation of systems flowcharts preparation of document flowcharts preparation of program flowcharts preparation of decision tables completion of questionnaires 3. Methods of Verifying the System Description discussion with users transaction testing observation b. 1. Enter Invoices This program permits operators to enter unpaid vendor invoices into the Accounts Payable system. The program should enable the distribution of the invoice to specific general ledger accounts. Controls include: check to ensure that the vendor number is on file, i.e., valid vendor number ensures that the invoice has not been previously entered, i.e., duplicate entry ensures that the invoice has been fully allocated to general ledger accounts ensures that the general ledger account numbers are valid ensures that items were ordered and received and that prices and other charges are ok. 2. Print Payable Checks This program generates checks to suppliers for paying outstanding invoices. Controls include: checks to ensure that the vendor number on the invoice record is valid (i.e., vendor is still on file) ensures that checks are used in sequential order ensures that only the outstanding invoice amount is paid provides an audit listing of invoices and the amount that is being paid by the check, i.e., remittance list ensures that negative checks are not printed ensures that checks do not exceed a predetermined amount ensures that all checks not used are voided by the computer (i.e., those used for check alignment) ensures that there is an approved, unpaid invoice in the Accounts Payable file 20.2 a. The problem identifies several reasons for the project's failure, including the following: The project was too large and far too complex. According to one consultant, the systems development process was so dynamic that the failure to complete the project quickly was self-defeating as modifications took over the original design. System requirements were never Afrozen@ so the project could be worked on. Management had no clear vision of the new MIS system. As a result, incompatible tracking systems sprung up throughout the company's distributed processing system. Management lacked a strong MIS staff. A qualified MIS staff could have governed the planning and development of the program more closely, improving the chances for success. The consulting firm had little experience. The firm had little understanding of the desired technology: a complex data base that represented the heart of the new system. The project had too many applications. Interdependencies among subprograms and subroutines left consultants with few completed programs. b. Organizational issues that management must address in the future could include the following: Management should develop a unified strategic information plan. Organizations should reinforce their business strategies with a complementary information strategy. If using a data base, management should consider a strategic data base plan to encourage a data-oriented system development process. Wang should establish an information systems steering committee to govern the development process and support the information plan. A steering committee can monitor the systems development process and oversee the work of a consulting team. Wang should support the strategy with an expanded, qualified MIS staff. A company's reputation as a leading computer expert is severely tarnished when it lacks the internal talent to develop a system for its own use. Management should seek a larger MIS staff with more qualified employees that have the necessary skills to support the information strategy. Wang should set policies governing the systems development process. Well-established procedures governing the planning, scheduling, design, implementation, and documentation of a new information system can minimize the risk of runaway projects. Management must also set standards governing the selection of consultants, if necessary. c. To improve the quality of consulting services, the company can do the following: Wang should improve existing development policies. Wang must first establish its internal development policies that govern the systems development process. For example, a more effective internal MIS staff can provide the consultants with necessary support. Wang should establish consulting services evaluation criteria. Management must view consultants as vendors and evaluate which consulting firm provides the best service at a fair price. For large projects, this may include closed bidding, background checks, credential checks, and more probing meetings to determine if the firm has the skills necessary to complete the project. Wang should monitor the work of consultants through the information steering committee and project development teams. An oversight body can reinforce the information strategy and hold the consulting team accountable for the development process. 20.3 Customer Maintenance Form WEAKNESS Form Weakness Explanation Recommendation No field for recording a new customer phone number. Tiny Toddlers cannot call the customer for more information if needed. The form should have a field after the address for a change in phone number. The form does not have a numerical control number. There is no way to ensure that all transactions are recorded. The form should have a preprinted number in the upper right corner. No indication that information has been entered into the computer system. The person entering the data does not initial the form after data is entered. A form may be missed or entered twice. The report should have a space for the person entering the information to initial.  There is no space provided for recording date of change. The data entry clerk would not know that the form contained outdated information.  An effective change date should be added to this report. The form does not have a place where the person who fills out the form can sign or initial. If the data entry clerk could not read or understand the information on the form, she would not know who filled out the form. A place should be provided for the person who fills out the form to sign or initial it. 20.3 (continued) Sales Order Form. WEAKNESS Report Weakness Explanation  Recommendation There is no indication of the customer's approval of the order. All orders should be signed by the customer where possible thus ensuring that the customer is responsible for requesting the order. Provision should be provided on the form for the customer's approval of the order. There are no dates on the form. Dates would indicate priority of the order as well as facilitate filing and matching of sales order with the corresponding invoice. Provisions on the report for sales order date and the required date. The form does not have a numerical control number. There is no method to facilitate assurance that all sales are recorded. The form should have a preprinted number in the upper right corner. No indication that information has been entered into the computer system. The person entering the data does not initial the form upon completion of the entry. The data entry person may miss or overlook entry of one of the reports. Prevent re-entry of data. The report should have a space for the person entering the information to initial. This indicates that the Customer Master File has been updated. There is no standard form number specified on the report.  The salesman may not be aware that he is using a current form. Use of a standard form number would facilitate ordering of additional forms. On the lower left corner of the form, a standard form and revision number should be included. There is no space provided for recording date of change. The data entry clerk would not know that the form contained outdated information.  An effective change date should be added to this report. Information that has preformatted entry should be indicated on the report. When completing his report, the salesperson may leave off some part of critical fields. Facilitates data entry since the information is in the format that it is entered. Information that is to be keyed from this form should be easily identified with provisions on the form for cash characters requiring entry. 20.4 Adapted from the CMA Exam. a. The steps Mickie Louderman should have taken during the design of the accounting information system to ensure that end-user needs were satisfied include the following: Interviews should have been conducted with all users who will be affected by any changes. The improved capabilities of the new system should have been presented to the users, particularly as the business has been growing and creating new information demands, so that these new capabilities could be considered in the system revisions. Fact finding interviews should identify and clarify users' current problems, future information needs, organizational units affected, procedures used to provide information, user decision responsibilities, and the information needed to make those decisions. As system/programs are developed, the changes, output reports, and controls should be reviewed with the affected users to ensure that their needs are being satisfied. Employees in the individual departments should be encouraged to make suggestions for changes and improvements. b. Basic principles of internal control that were violated during the implementation of the new accounting system include the following three. Most of the control features of the "old" system were retained in the "new" system; however, the procedures for maintaining controls were substantially changed. The procedures and controls were not coordinated. More importantly, controls appropriate for the "new" systems were not properly developed and evaluated. Proper backup procedures were not implemented in many areas. Systems, programming, and operating documentation were behind schedule. This put the system and overall operations in a vulnerable position. The concept of separation of duties was violated by allowing (1) both inventory control and purchasing personnel to issue purchase orders, and (2) payroll clerks to prepare journal entries for payroll processing. c. Weaknesses to Mickie Louderman's approach in implementing the new accounting system, and the recommendations to improve the situation and continue the development of the remaining areas of the accounting information system include those outlined below. 1. Weaknesses2. RecommendationsPoor planning and no systems analysis or feasibility study.Perform a thorough systems analysis that includes a feasibility study. Prepare a development plan, a budget, and a schedule for project completion.Necessary systems testing and reviews were not conducted prior to implementation.All modules should be properly tested for processing, informational, and control effectiveness. An accepted implementation plan for each module must be formalized and followed. Users must participate in the development of the systems plan, the tests of information content and controls, and final implementation acceptance.System modules implemented without adequate training, documentation, or instructions.New modules should not be implemented until adequate documentation is prepared and all affected organizations and personnel have been appropriately trained. 20.5 Adapted from the CMA Exam. a. Four major objectives which Columbia Corporation's automated property system should possess include: Completeness. Records for all the fixed assets owned by Columbia Corporation need to be included in the system. Completeness is important because the users of information derived from the system will assume the data in the system are complete and all fixed assets are recorded. Accuracy. Accuracy in establishing records and updating them based upon current transactions are very important if users are going to rely on the information generated for decisions. Timeliness. Transactions affecting the fixed assets records should be processed as quickly as possible. Users of the information will assume that all events pertaining to the fixed asset property records are reflected in the records. In addition, requests for information from the system should be handled as expeditiously as possible. Information has to be provided on a timely basis to users if the information is to be useful for decision-making purposes. Flexibility. The property AIS should be designed to permit additions, revisions, and changes without a complete redesign. Flexibility ensures that the computer will adapt to changing business needs. b. Each of the following data items should be included in the computer record for each asset owned: Descriptive data: Name of asset, Manufacturer, Model and Serial number, Asset class code Company assigned asset number General ledger account number Location data (plant, department, building) Acquisition date Original cost Data for book depreciation and tax depreciation Maintenance record: cycle, date, amount Estimated salvage value 20.6 Adapted from the CIA Exam. a. The logical sequence of occurrence is as follows: 1. System Planning Study 2. User Specifications 3. Technical Specifications 4. Implementation Planning 5. Programming 6. User Procedures and Training 7. System Test 8. Conversion 9. Postimplementation Planning b. Three types of documentation of a file conversion work plan that would be of particular interest to an auditor are: 1. Edit documentation indicating that all of the previously existing files have been converted to a satisfactory level of quality. 2. Operating or test documentation indicating that the converted files are able to support the volume of work in the application. 3. Application documentation indicating that the system ultimately implemented had proper approval of the user and EDP management. 20.7 Student solutions will vary depending on the database used and the fields selected. Below is an example of a simple form created from the Microsoft Access sample database.  20.8 Student solutions will vary depending on the database used and the fields selected. Below is an example of a simple report created from the Microsoft Access sample database.  20.9 a. Among the many tasks MetLife performed in their 9-month integration window were the following: Separate Travelers information systems operations and assets from Citicorps so MetLife could begin the systems integration process. Determine what systems had to be integrated before the deadline and which could be outsourced to Citicorp until they could be integrated into MetLifes system. Develop a critical path for the integration process so delays in critical path activities did not delay the whole process. Train large numbers of employees in project planning activities and tools. Identify and freeze systems requirements from users as soon as possible. The project management team should establish early deadlines for systems requirements and hold users to them. Increase system capacity to handle all of the new data from the Travelers systems. Develop/modify transaction processing systems to handle all of Travelers transaction data. Perform a security and privacy analysis of all of Travelers systems and determine needed upgrades to comply with MetLifes security policies. Change Travelers laptop and desktop infrastructure so that it matched MetLifes. Enlarge MetLifes distribution system by integrating over 150 annuity and life insurance wholesalers and giving them appropriate access to MetLifes systems. Add all 4000 plus Travelers employees to MetLifes Human Resources and Payroll systems. Included in that was adding all the employees to MetLifes email system. Move Travelers 6 life insurance and 2 annuity product lines to MetLifes systems. Travelers investment portfolio also had to be made accessible to MetLife managers before the deal closed. Both projects required MetLife and Travelers employees to analyze the differences between the ways data were stored in the two companies. They then had to map all data elements in each system so they could convert Travelers data to the MetLife data storage format. This was one of the most difficult tasks required by the acquisition. Integrate the two companys data centers. This required some data centers to be combine and others to be expanded. Determine system test capacities, build test environments, and lock down testing procedures and capabilities. Stress and user acceptance testing had to be performed at least 3 months prior to the integration date. Travel to every country and every major Travelers office to train former Travelers employees on the MetLife systems. b. There are a number of articles that describe MetLifes experience. A particularly good article is Nine Months to Merge found in the February 20, 2006 issue of Information Week. 20.10 (Adapted from Polly Scheider, Lessons learned: Payroll on the Loose, CIO (December 1, 1998): 56-58). 1. Running in parallel refers to a method of system conversion where both the old and the new system are run at the same time using the same inputs and comparing the outputs until the organization is certain that the new system is functioning properly. 2. If the company had run the new and old systems in parallel, all of the errors mentioned in the case would have been identified and corrected before the new system was brought on-line. 3. The company could have implemented a pilot conversion where one office or branch of the company could have implemented, tested, and corrected any errors before releasing the system to the rest of the organization. Alternatively, the company could have performed a phased conversion where a new system is implemented, tested, and modified one phase or module at a time. 4. There does not appear to be proper management or leadership of the system development, implementation, or testing processes involved in this system. 20.11 (Adapted from Tom Field, Too many Cooks in the Kitchen, CIO (December 1, 1998): 54-56). 1. Potential causes for the systems implementation failure include: Leadership and managerial oversight is clearly lacking at Signal Enterprises. It does not appear that anyone checked out the competence of the outside vendor Programmers who were familiar with the project were reassigned to other projects. 2. Signal should have taken the following steps to successfully design and implement the call tracking system: Start and end the process with a clearly designated manager over the project and with clearly defined lines of authority. Institute a formal review process for hiring consultants. Require change control documentation so managers can see what changes were made during development. Assign a central manager for the project team who is the conduit for communication and decisions. SUGGESTED ANSWERS TO THE CASES 20.1 Answers to this case will vary with the student's experience. Make sure that the student is thorough in addressing all the requirements of the case. 20.2 Adapted from the CMA Exam. 1. The criteria which must be considered in specifying the basic structure and features of Citizens' Gas Company's new system to assist in planning its natural gas needs include the following: Need for market information The factors which affect the demand and supply for gas must be isolated, their relative importance determined, and their effect quantified. Need for accuracy The accuracy requirement of the system determines the required level of detail, quality of the input data, and sophistication of the system logic. While the system must be designed to provide accuracy which matches the need, care must be taken to ensure that excessive effort is not spent in being overly accurate in specific areas when the overall accuracy is inherently less due to the planning environment. Frequency of use The frequency of use of the system provides direction as to the level of mechanization. If the system will be used only once each month to project the effect of the most recent actual data, it may be sufficient to develop a system which is a combination of mechanized and manual procedures. If it is likely that a variety of alternatives will be evaluated each month, a fully mechanized system will be more desirable. Turnaround required The need for timely reporting at month end will also provide guidance as to the degree of mechanization and the level of complexity that will be appropriate. Because the system is to be used for both multi-year planning and monthly tactical planning, the system should be designed to provide for quick turnaround of results at month end. Accordingly, consideration must be given to minimizing the data input requirements. Cost/benefit analysis The new system should be able to provide the quality of information so that its implementation can be justified on a cost basis. Data processing environment Typically, planning systems of the nature described in the problem require a significant amount of computer resources, both in terms of the run-time requirements and the data storage requirements. The constraints imposed by the company's data processing system will to a great extent determine the maximum level of detail and complexity of the system, unless the decision is made to use external facilities, in which case the capabilities of the external system must be considered. Supportability The system which is designed must be supportable by company personnel on an ongoing basis. This includes the monthly collection and loading of data as well as the periodic maintenance of the system logic. If the support burden is excessive, the system will suffer from lack of timely reporting or will be run using simplifying assumptions that affect the degree of accuracy and credibility of the system. If the system cannot be readily modified and maintained, it will quickly fall into a state of disrepair and will no longer be used. 2. Major data items which should be incorporated into the new system, the rationale for their inclusion, and the level of detail necessary include the following: Number of customers The customer count should be projected by month, unless customer growth is fairly regular, in which case a base customer count can be used in conjunction with a growth factor. The customer count should be broken into categories based upon use which will facilitate estimating demand, [i.e., residential, commercial heating, commercial nonheating, industrial heating, industrial nonheating, large industrial (currently 25)]. Weather data Data which helps to project the heating requirements as a function of weather should be projected monthly. For the first year, meteorological trends may indicate an unusually warm or cold year. For the following years, average monthly weather data may be used. Heating factors Heating factors are data which convert weather data to customers' demand. They should be provided for each type of customer which uses heating, i.e., residential, commercial heating, and industrial heating. They are not necessary for the top 25 industrial customers as their consumption is not highly weather dependent. The heating factors need not vary by month unless it is determined that a seasonal relationship exists or that trends such as conservation are likely. Customer unit demand The average monthly consumption for each commercial and industrial nonheating customer must be provided, either as a constant or varying over time to reflect both seasonal fluctuations and longer term trends. This data would also be used to project the nonheating portion of commercial and industrial customer demand. Sales forecasts The sales to each of the top 25 industrial accounts should be forecast individually by month for the first year of the five year plan; future years may make use of annual growth rates. Heating and nonheating sales for all other customers will be projected by revenue class by the system. Customer rate structure The customer rate structure should provide monthly rate information at the revenue class level, i.e., residential, commercial, and industrial. Data must be monthly to provide for periodic rate changes by revenue class. Supplier contract terms For each supply contract, the contract term (beginning and end dates), monthly volumes, unit costs, and take-or-pay conditions must be maintained. Storage field capacity The capacity of the gas storage field is required in order to determine if gas remains in storage which can be withdrawn to supplement pipeline supply. Priority system A priority system needs to be established in case the company needs to curtail service to its customers due to an inadequate supply of gas. The first six factors are necessary in order to determine the demand for gas. The next two items are necessary to determine supply. The last item is necessary to give direction whenever the supply is not adequate to meet demand. Data must be considered on a monthly basis because of the implied monthly variations of demand and supply.     Accounting Information Systems 20-PAGE 22 2009 Pearson Education, Inc. 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