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Entity Function Matrix – Putting It All Together. Northern College Diploma Philip Bird. Entity Model. Current Physical DFD. Problems and new requirements. Current Logical DFD. Required Logical DFD. Entity Life History. Required Physical DFD. Entity Function Matrix. The SSADM Route.

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Entity Function Matrix – Putting It All Together

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Entity Function Matrix – Putting It All Together

Northern College Diploma

Philip Bird


Entity Model

Current Physical DFD

Problems and new requirements

Current Logical DFD

Required Logical DFD

Entity Life History

Required Physical DFD

Entity Function Matrix

The SSADM Route

Data Flow Modelling

Entity Modelling


Entity Function Matrix

  • Cross reference entities with functions.

  • List all entities from entity modelling.

  • List all functions from data flow modelling.

  • Mark the intersection with a Delete, Read, Modify, Create or leave blank.

  • In a full system all entities should have D, C, R/M entries.


Place order

Add new customer

Get stock delivery

Cancel order

Customer

2

4

Product

Order

Customer

1

3

Supplier

Order Processing DFD


Customer

Order

Order line

Product

Order Processing Entity Model


Place order

Add new customer

Get stock delivery

Cancel order

Customer

2

4

Product

Order

Customer

1

3

Supplier

Entity Function Matrix


Customer

Order

Order line

Product

Entity Function Matrix


Entity Function Matrix

RC M

RD M

M

C


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