Selecting the Best Alternative
Class 19
SDLCProject Identification
& Selection
Project Initiation& Planning
Analysis***
Logical Design
Physical Design
Implementation
Maintenance
Analysis Steps
1. Requirements Determination 2. Requirements Structuring 3. Alternative Generation & Selection
3a. Functional requirements 3b. Environment 3c. Implementation
4. Review Recommendations with Management
Deliverables Usually three different alternatives for
building the replacement or new information system
The alternative judged most likely to lead to the most desirable information system
A Baseline Project Plan for turning the most likely alternative into a working information system
Step 3a:
Prioritize Requirements Refine scope Determine level of automation
Step 3a: Generate and evaluate Functional Requirement alternatives
Generate more than one alternative based on functional requirements Typically 3 chosen
Bare Bones solution Mid-level solution Bells & Whistles solution
Choosing the alternatives Reevaluate feasibility Consider constraints:
1. 2. 3. 4. 5.
Step 3a: Generate and evaluate Functional Requirement alternatives
Propose 3 alternatives Select Best
On a related note, why might a company decide to end the project at this point?
Step 3b: Generate and evaluate Environment alternatives
Hardware, System software, Networks
Development tools
Step 3c: Generate and evaluate implementation alternatives
Outsourcing / Custom-built Packages, Turnkey, ERP In-house
Outsourcing / Custom built The practice of turning over
responsibility of some to all of an organization’s information systems applications and operations to an outside firm
Examples:
Outsourcing: What to consider 1. 2. 3.
Choosing Off-the-Shelf Software
______________ ______________ ______________ ______________ ______________
How Can We Get Information About a Software Package?
_______________________ _______________________ _______________________ _______________________
In-house development Advantages
1.
Disadvantages 1.
Why are we worrying about implementation alternatives now?
Training users Cost Support User acceptance
Step 4: Review with management
How formal? How to compile, organize, and
present
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