可行性分析与系统方案书

1、可行性分析与系统建议书可行性分析可行性 (feasibility) 可行性是一种评量，用来评估信息发展系统将对组织有何利益。可行性分析 (feasibility analysis) 是评量可行性的一个过程。可行性的渐进式约束法 (creeping commitment) 表示可行性应该在整个生命周期中评估。可行性的四种测试操作可行性是一个解决方案在组织中运作时，令人满意程度的评量。它同时也是人们对此系统项目感想的评量。技术可行性是一个特定技术解决方案的实用性，以及技术上的资源与专业知识的可利用性之评量。时程可行性是项目的时间表合理程度的评量。经济可行性是项目或解决方案的成本效益之评量。建议的系

2、统方案之成本备选系统表备选系统表(candidate systems matrix)说明备选系统的相似与相异之处；但是，它不提供分析。备选系统表范例CharacteristicsPortion of System ComputerizedBrief 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 candi

3、date.Servers and WorkstationsA description of the servers and workstations needed to support this candidate.Software Tools NeededSoftware tools needed to design and build the candidate (e.g., database management system, emulators, operating systems, languages, etc.). Not generally applicable if appl

4、ications software packages are to be purchased.Candidate 1COTS package Platinum Plus from Entertainment Software Solutions would be purchased and customized to satisfy Member Services required functionality.This solution can be implemented quickly because its a purchased solution.Technically archite

5、cture dictates Pentium III, MS Windows 2000 class servers and workstations (clients).MS Visual C+ and MS Access for customization of package to provide report writing and integration.Candidate 2Member Services and warehouse operations in relation to order fulfillment.Fully supports user required bus

6、iness processes for SoundStage Inc. Plus more efficient interaction with member accounts.Same as candidate 1.MS Visual 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(Conti

7、nued)备选系统表范例 (续)CharacteristicsApplication SoftwareA description of the software to be purchased, built, accessed, or some combination of these techniques.Method of Data ProcessingGenerally some combination of: on-line, batch, deferred batch, remote batch, and real-time.Output Devices and Implicatio

8、nsA description of output devices that would be used, special output requirements, (e.g., network, preprinted forms, etc.), and output considerations (e.g., timing constratints)Candidate 1Package solutionClient/Server(2) HP4MV department laser printers(2) HP5SI LAN laser printersCandidate 2Custom so

9、lutionSame as candidate 1.(2) HP4MV department laser printers.(2) HP5SI LAN laser printers(1) PRINTRONIX bar-code printer (includes 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 candid

10、ate 1.Same as candidate 2.(Continued)备选系统表范例 (续)CharacteristicsInput devices and ImplicationsA description of input methods to be used, 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.,

11、 timing of actual inputs).Storage Devices and ImplicationsBrief description of what data would be stored, what data would be accessed 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

12、Server DBMS with 1000GB arrayed capability.Candidate 2Apple “Quick Take” digital camera and software(15) PSC Quickscan laser bar-code scanners(1) HP Scanjet 4C Flatbed ScannerKeyboard and mouseSame as candidate 1.Candidate 3Same as candidate 2.Same as candidate 1.可行性分析表可行性分析表 (feasibility analysis m

13、atrix)。用备选系统的分析和评等来补充说明备选系统。可行性分析表范例Feasibility CriteriaOperational FeasibilityFunctionality. A description of to what degree 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

14、, user, and organization perspective.Technical FeaasibilityTechnology. An assessment of the maturity, availability (or ability 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

15、 maintain the candidate system.Economic FeasibilityCost to develop:Payback period (discounted):Net present value:Detailed calculations:Schedule FeasibilityAn assessment of how long the solution will take to design and implement.RankingCandidate 1Only supports Member Services requirements and current

16、 business processes would have to be modified to take advantage of software functionality.Score: 60Current production release 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

17、 support.Required to hire or train C+ expertise to perform modifications for integration requirements.Score: 50Approximately $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:

18、100Although current technical staff has only Powerbuilder experience, the senior analysts who saw the MS Visual Basic demonstration 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 che

19、aper 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 Power

20、builder, management is concerned with recent acquisition of Powerbuilder by Sybase Inc.MS SQL Server is a current company standard and competes with SYBASE in the client/server DBMS market. Because of this we have no guarantee future versions of Powerbuilder will “play well” with out current SQL Ser

21、ver.Score: 60Approximately $400.000.Approximately 3.3 years.Approximately $325,500.See Attachment A.Score: 909-12 months.Score: 8585Wt.30%30%30%10%100%书面报告的格式事实格式管理格式I.简介I.简介II方法和程序II结论和建议III事实和细节III事实和细节的讨论与分析IV.事实和细节的摘要与讨论IV.方法和程序V.建议V.最后结论VI.结论VI.事实和细节的附录书面报告的次要元件送交信函封面目录图片、图表和表格目录摘要或执行性摘记(主要元件报告的主体，以事实格式或管理格式撰写出现在报告的这一部分)。附录The End只有刚强的人，才有神圣的意志，凡是战斗的人，才能取得胜利。7月-227月-22Wednesday, July 20, 2022如果惧怕前面跌宕的山岩，