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8 8 Learning Objectives Chapter 8: Evaluating Alternatives for Requirements, Environment, and Implementation  Prioritize the system requirements based on the desired scope and level of automation for the new system  Describe the strategic decisions that integrate the application deployment environment and the design approach for the new system  Determine alternative approaches for system development Systems Analysis and Design in a Changing World, 3rd Edition 2 Systems Analysis and Design in a Changing World, 3rd Edition 8 8 Learning Objectives (continued)    Overview  Evaluate and select a development approach based on the needs and resources of the organization Chapter explains last three activities of analysis  Prioritize systems requirements  Generate and evaluate alternatives  Review recommendation with management Describe key elements of a request for proposal and evaluate vendors’ proposals for outsourced alternatives  Refocus project direction  Transition from discovery and analysis to solutions and design Develop a professional presentation of findings to management  Set direction for design and implementation of solution system 3 Systems Analysis and Design in a Changing World, 3rd Edition 8 8 Project Management Perspective  Project manager and senior technical members of project team work together  Eight areas of project management  Scope  Human resources  Time  Procurement  Cost  Communications  Quality  Risk Systems Analysis and Design in a Changing World, 3rd Edition 4 Systems Analysis and Design in a Changing World, 3rd Edition Deciding on Scope and Level of Automation  Scope determines which business functions will be included in system  Level of automation is how much computer support exists for functions included in level  Scope creep   5 Requests for addition of system functions after requirements defined and decision has been made Users typically request more business functions than budget allows Systems Analysis and Design in a Changing World, 3rd Edition 6 8 8 Determining the Level of Automation  Low level    Key criteria that are used: Simple computer records keeping Midrange point which combines features from low and high alternatives System takes over processing of business function 7 Systems Analysis and Design in a Changing World, 3rd Edition Defining the Application Deployment Environment  Entire group of alternatives is evaluated together to provide “big picture” view of proposed system High level    Medium level   Selecting Alternatives Computer hardware  System software  Networks  Development Tools Strategic plan  Economic feasibility  Schedule and resource feasibility  Technological feasibility  Operational, organizational, and cultural feasibility 8 Hardware, System Software, and Networks Existing environment generally considered and compared with proposed environment 9 Systems Analysis and Design in a Changing World, 3rd Edition  Older batch-mode applications on centralized mainframe  Stand-alone applications on mini- and personal computers  On-line interactive applications  Distributed applications  Web-based applications Systems Analysis and Design in a Changing World, 3rd Edition 8 Compatibility with system requirements  Compatibility among hardware and system software  Required interfaces to external systems  Conformity with IT strategic plan and architecture plans  Cost and schedule Systems Analysis and Design in a Changing World, 3rd Edition 10 8 Deployment Environment Characteristics  8 Systems Analysis and Design in a Changing World, 3rd Edition 8 Configuration of:   Development Tools 11  Programming languages, CASE tools, software used to develop application software  Java and Visual Studio.NET are examples  Application deployment environment decisions limit development tool choices  Operating system environment  Database management system (DBMS)  Distributed software standard Systems Analysis and Design in a Changing World, 3rd Edition 12 8 8 Existing Processing Environment at RMO Systems Analysis and Design in a Changing World, 3rd Edition Processing Environment Alternatives 13 Systems Analysis and Design in a Changing World, 3rd Edition 8 8 Strategic Directions for RMO Choosing Implementation Alternatives   Systems Analysis and Design in a Changing World, 3rd Edition 15 Variations on obtaining system  Facilities management outsource all IS support  Packaged software, Turnkey system, ERP system  Custom-built software systems  In-house development Selection dimensions  Buy vs. build  In-house vs. outsource Systems Analysis and Design in a Changing World, 3rd Edition 8 16 8 Implementation Alternatives Selecting an Implementation Alternative   Systems Analysis and Design in a Changing World, 3rd Edition 14 17 Identifying Criteria for Selection  Comparisons can be difficult  Different proposed systems have strengths in different areas Three major areas to consider  General requirements  Technical requirements  Functional requirements Systems Analysis and Design in a Changing World, 3rd Edition 18 8 Partial Matrix of General Requirements Systems Analysis and Design in a Changing World, 3rd Edition 8 Partial Matrix of Functional Requirements 19 Systems Analysis and Design in a Changing World, 3rd Edition 8 8 Partial Matrix of Technical Requirements Systems Analysis and Design in a Changing World, 3rd Edition Making the Selection 21  First, rate each alternative with raw score  Weighted scores are then tabulated and compared to make a choice  RMO decided on in-house development for most CSS development to keep expertise within RMO  RMO wants to hire some new technical specialists  RMO feasibility review showed no serious problems – once specialists are added Systems Analysis and Design in a Changing World, 3rd Edition 8 Contracting with Vendors  Formal document sent to vendors if in-house development not selected  States requirements and solicits proposed solutions  Considered a competitive contract offer  Bid on supplying hardware, software, and/or support services Systems Analysis and Design in a Changing World, 3rd Edition 22 8 Sample RFP Table of Contents Generating Request for Proposal (RFP)  20 I. Introduction and Background II. Overview of Need III. Description of Technical Requirements IV. Description of Functional Requirements 23 Systems Analysis and Design in a Changing World, 3rd Edition 24 8 Sample RFP Table of Contents (continued) 8 Sample RFP Table of Contents (continued) V. Description of General Requirements VI. Requested Provider and Project Information VII. Details for Submitting Proposal IV. Evaluation Criteria and Process Systems Analysis and Design in a Changing World, 3rd Edition 25 Systems Analysis and Design in a Changing World, 3rd Edition 8 Benchmarking and Choosing a Vendor 8 Presenting Results and Making Decisions  Observe in use or install trial version  Compile and organize documentation  Benchmark – evaluate the system against a standard  Present alternatives and critical issues in easy-tounderstand but complete manner  Final choice generally made by executive steering committee  Format of documentation and presentation style varies with organization  Visit another company using particular system  Developing a contract  Fixed-dollar contracts: Risk is on vendor  Cost-plus-percentage: Risk is on purchaser  Cost-plus-fixed-fee: Risk shared by both Systems Analysis and Design in a Changing World, 3rd Edition 27 Systems Analysis and Design in a Changing World, 3rd Edition 8 These activities are primarily project manager responsibilities with support from project team  Focus of project changes from discovering requirements to developing solution system  Prioritize requirements based on scope and level of automation   Summary (continued)   Scope of new system determines functions it will support Level of automation is measure of how automated selected functions will be Systems Analysis and Design in a Changing World, 3rd Edition 28 8 Summary  26 29 Application deployment environment  Computer hardware, systems software, and networks in which new system will operate  Determines constraints imposed on system development alternatives Analyst must define environment to match:  Application requirements  Organization’s strategic application plans  Organization’s technology architecture plans Systems Analysis and Design in a Changing World, 3rd Edition 30 8 Summary (continued)  Determine what alternatives are possible for developing solution  Implementation alternatives include:   Building system in-house  Buying packaged or turnkey solution  Contracting with developer to build it (outsource) Develop recommendations and present to management to make funding decisions Systems Analysis and Design in a Changing World, 3rd Edition 31