可行性分析与系统建议书

1、可行性分析與系統建議書可行性分析與系統建議書alex lai可行性 (feasibility) 可行性是一種評量，用來評可行性是一種評量，用來評估資訊發展系統將對組織有何利益。估資訊發展系統將對組織有何利益。可行性分析 (feasibility analysis) 是評量可行性是評量可行性的一個過程。的一個過程。可行性的漸進式約束法 (creeping commitment) 表示可行性應該在整個生命週期中評估。表示可行性應該在整個生命週期中評估。l操作可行性是一個解決方案在組織中運作時，是一個解決方案在組織中運作時，令人滿意程度的評量。它同時也是人們對此系令人滿意程度的評量。它同時也是人們對

2、此系統統專案感想的評量。專案感想的評量。l技術可行性是一個特定技術解決方案的實用性，是一個特定技術解決方案的實用性，以及技術上的資源與專業知識的可利用性之評以及技術上的資源與專業知識的可利用性之評量。量。l時程可行性是專案的時間表合理程度的評量。是專案的時間表合理程度的評量。l經濟可行性是專案或解決方案的成本效益之評是專案或解決方案的成本效益之評量。量。備選系統表(candidate systems matrix)說明備選系統的相似與相異說明備選系統的相似與相異之處；但是，它不提供分析。之處；但是，它不提供分析。characteristicsportion of system computer

3、izedbrief description of that portion of the system that would be computerized in this candidate.benefitsbrief description of the business benefits that would be realized for this candidate.servers and workstationsa description of the servers and workstations needed to support this candidate.softwar

4、e tools neededsoftware tools needed to design and build the candidate (e.g., database management system, emulators, operating systems, languages, etc.). not generally applicable if applications software packages are to be purchased.candidate 1cots package platinum plus from entertainment software so

5、lutions would be purchased and customized to satisfy member services required functionality.this solution can be implemented quickly because its a purchased solution.technically architecture dictates pentium iii, ms windows 2000 class servers and workstations (clients).ms visual c+ and ms access for

6、 customization of package to provide report writing and integration.candidate 2member services and warehouse operations in relation to order fulfillment.fully supports user required business processes for soundstage inc. plus more efficient interaction with member accounts.same as candidate 1.ms vis

7、ual basic 5.0system architect 2001internet explorercandidate 3same as candidate 2.same as candidate 2.same as candidate 1.ms visual basic 5.0system architect 2001internet explorer(continued)characteristicsapplication softwarea description of the software to be purchased, built, accessed, or some com

8、bination of these techniques.method of data processinggenerally some combination of: on-line, batch, deferred batch, remote batch, and real-time.output devices and implicationsa description of output devices that would be used, special output requirements, (e.g., network, preprinted forms, etc.), an

9、d output considerations (e.g., timing constratints)candidate 1package solutionclient/server(2) hp4mv department laser printers(2) hp5si lan laser printerscandidate 2custom solutionsame as candidate 1.(2) hp4mv department laser printers.(2) hp5si lan laser printers(1) printronix bar-code printer (inc

10、ludes software & drivers)web pages must be designed to vga resolution. all internal screens will be designed for svga resolution.candidate 3same as candidate 2.same as candidate 1.same as candidate 2.(continued)characteristicsinput devices and implicationsa description of input methods to be use

11、d, input devices (e.g., keyboard, mouse, etc.), special input requirements (e.g., new or revised forms from which data would be input), and input considerations (e.g., timing of actual inputs).storage devices and implicationsbrief description of what data would be stored, what data would be accessed

12、 from existing stores, what storage media would be used, how much storage capacity would be needed, and how data would be organized.candidate 1keyboard & mouse.ms sql server dbms with 1000gb arrayed capability.candidate 2apple “quick take” digital camera and software(15) psc quickscan laser bar-

13、code scanners(1) hp scanjet 4c flatbed scannerkeyboard and mousesame as candidate 1.candidate 3same as candidate 2.same as candidate 1.可行性分析表 (feasibility analysis matrix)。用備選系統的分析和評等來補。用備選系統的分析和評等來補充說明備選系統。充說明備選系統。feasibility criteriaoperational feasibilityfunctionality. a description of to what de

14、gree the candidate would benefit the organization and how well the system would work.political. a description of how well received this solution would be from both user management, user, and organization perspective.technical feaasibilitytechnology. an assessment of the maturity, availability (or ab

15、ility to acquire), and desirability of the computer technology needed to support this candidate.expertise. an assessment of the technical expertise needed to develop, operate, and maintain the candidate system.economic feasibilitycost to develop:payback period (discounted):net present value:detailed

16、 calculations:schedule feasibilityan assessment of how long the solution will take to design and implement.rankingcandidate 1only supports member services requirements and current business processes would have to be modified to take advantage of software functionality.score: 60current production rel

17、ease of platinum plus package is version 1.0 and has only been on the market for 6 weeks. maturity of product is a risk and company charges an additional monthly fee for technical support.required to hire or train c+ expertise to perform modifications for integration requirements.score: 50approximat

18、ely $350,000.approximately 4.5 years.approximately $210,000.see attachment a.score: 60less than 3 months.score: 9560.5candidate 2fully supports user required functionality.score: 100although current technical staff has only powerbuilder experience, the senior analysts who saw the ms visual basic dem

19、onstration and presentation have agreed the transition will be simple and finding experienced vb programmers will be easier than finding powerbuilder programmers and at a much cheaper cost.ms visual basic is a mature technology based on version number.score: 95approximately $418,040.approximately 3.5 years.approximately $306,748.see attachment a.score: 859-12 months.score: 8092candidate 3same as candidate 2.score: 100although current technical staff is comfortable with powerbui