INFORMATION X INFO415: Systems Analysis Systems Analysis Project Deliverable 3 Requirements Models

INFO415: Systems Analysis INFORMATION X Deliverable 3 Context  You have defined your problem and built a set of activity diagrams that outline what the new/modified information system needs to do.  You have defined key functional and non-functional requirements  Its time to logically model the requirements from an event and object perspective.

INFO415: Systems Analysis INFORMATION X Objectives  Your team’s objectives are to:  Develop an Event Table modeling 4-6 key events the system must respond to.  Develop a Class diagram that models the objects required to support your events  Develop a Functional Decomposition Diagram  Draw a context diagram for each sub-system  Draw DFD fragments for each sub-system and combine all the DFD fragments  Draw a Decision Table for Decision situation

INFO415: Systems Analysis INFORMATION X Deliverable  A Word document  11 point Arial font  Double spaced – 1.25 inch margin top and bottom. 1 inch left and right.  Good document format – same as previous deliverables  Your audience: your sponsor and the user(s) you interviewed to define requirements. Your models will also be used by designers to develop physical design documents, but this is a secondary consideration.

INFO415: Systems Analysis INFORMATION X Grading  Document structure and grammar – 10% For the proposed system  Event table– 15%  Class Diagram/descriptions – 20%  Functional Decomposition Diagram (3 level hierarchy) – 10%  Context diagram for each sub-system (minimum three sub-systems) – 15%  DFD Fragments for each sub-system and combining all the fragments for a sub-system – 20%  Decision Table for one decision situation – 10%

INFO415: Systems Analysis INFORMATION X Document Contents  Introduction (couple of paragraphs)  What’s in this document  Background (1/2 page – 1 page)  No more than a page – tell reader what has happened to get to this point in the project Remember to Introduce each section of your document – tell the reader what to expect!! When presenting a model, describe what the symbols mean!

INFO415: Systems Analysis INFORMATION X Document Contents  Event Table.  4-6 Events – corresponds to the business processes you modeled using activity diagrams in deliverable 2  Use the Event Table  Make sure you introduce the section – describe what is in the table!

INFO415: Systems Analysis INFORMATION X Information about Each Event in an Event Table: Catalog of Information about Each Use Case (Figure 5-15)

INFO415: Systems Analysis INFORMATION X Document Contents  Class Diagram  Part 1: Diagram. >Must have at least 6 classes in your model. >At least 1 class must be associative (resolves a many to many relationship) >At least 1 class must store information about an event or transaction >Label each relationship in two directions >No many to many relationships! >Use class cardinality notation from text  Part 2: Class Descriptions. For each class provide: >Description for each class (what information does the class contain?) >Primary Key. >A minimum of 4 non-key attributes

INFO415: Systems Analysis INFORMATION X Example: Course Enrollment Design Class Diagram (Figure 5-40)

INFO415: Systems Analysis INFORMATION X Document Contents Use a table like the following to document each class Class Name Entity X Description This entity containing information regarding…. Attributes Attribute Name(s) Description Primary Key Key Attribute (may be more than one attribute) Describes the attribute Non-KeyAttributes Attribute 1Describe… Attribute 2 Etc.

INFO415: Systems Analysis INFORMATION X Functional Decomposition Diagram (FDD)  Draw an FDD for three levels Level 1: Proposed System Level 2: Sub-systems (minimum three) Level 3: Modules (Sub-sub-systems- minimum three modules for each sub-system )

INFO415: Systems Analysis INFORMATION X Develop Context Diagram for each sub- system (minimum of 3 sub-systems) RMO Order-Entry Subsystem (Figure 6-11)

INFO415: Systems Analysis INFORMATION X Three Separate DFD Fragments for Course Registration System

INFO415: Systems Analysis INFORMATION X Combining DFD Fragments to Create Event- Partitioned System Model (Figure 6-8)

INFO415: Systems Analysis INFORMATION X Decision Table  Draw a decision table for one decision-situation  Summarize complex decision logic  Incorporate logic into the table to make descriptions more readable

INFO415: Systems Analysis INFORMATION X Reminders  Start NOW – there is a large amount of work in this deliverable.  Divide and Conquer! You will struggle if you don’t do this successfully. Suggest that you:  Meet initially to divide work and come up with a plan – when wil you meet to review and consolidate  Go off and work individually on your piece of the project  Meet to review, as required.  Have a final meeting to consolidate.  Assign one person to be responsible for final document edits – document should read as if written by one person!! This means you may decide to give one group member less modeling work – document consolidation is time consuming.  Each team member should read the consolidated document, suggest revisions, before handing the document in.