Windsor Software

Windsor Software Model™ of the
TOGAF® Architecture Development Method (ADM)

   ADM Phases & Steps - Requirements Management - Steps:

  
The steps in the Requirements Management phase are described in the table below:

 

Requirements Management Steps

ADM Phase Steps

Step 1

 

Identify/document requirements - use business scenarios, or an analogous technique

Step 2

Baseline requirements:

  • Determine priorities arising from current phase of ADM
  • Confirm stakeholder buy-in to resultant priorities
  • Record requirements priorities and place in requirements repository

 

Step 3

Monitor baseline requirements

 

Step 4

 

Identify changed requirements:

  • Remove or re-assess priorities
  • Add requirements and re-assess priorities
  • Modify existing requirements

Step 5

Identify changed requirements and record priorities:

  • Identify changed requirements and ensure the requirements are prioritized by the architect(s) responsible for the current phase, and by the relevant stakeholders
  • Record new priorities
  • Ensure that any conflicts are identified and managed through the phases to a successful conclusion and prioritization
  • Generate Requirements Impact Statement (see 36.2.18 Requirements Impact Assessment)for steering the architecture team

Notes

  • Changed requirements can come in through any route. To ensure that the requirements are properly assessed and prioritized, this process needs to direct the ADM phases and record the decisions related to the requirements.
  • The Requirements Management phase needs to determine stakeholder satisfaction with the decisions. Where there is dissatisfaction, the phase remains accountable to ensure the resolution of the issues and determine next steps.

 

Step 6

 
  • Assess impact of changed requirements on current (active) phase
  • Assess impact of changed requirements on previous phases
  • Determine whether to implement change, or defer to later ADM cycle; if decision is to implement, assess timescale for change management implementation
  • Issue Requirements Impact Statement, Version n+1

Step 7

 

Implement requirements arising from Phase H

The architecture can be changed through its lifecycle by the Architecture Change Management phase (Phase H). The requirements management process ensures that new or changing requirements that are derived from Phase H are managed accordingly.

Step 8

Update the requirements repository with information relating to the changes requested, including stakeholder views affected

 

Step 9

 

Implement change in the current phase

Step 10

 

Assess and revise gap analysis for past phases

The gap analysis in the ADM Phases B through D identifies the gaps between Baseline and Target Architectures. Certain types of gap can give rise to gap requirements.

The ADM describes two kinds of gap:

  • Something that is present in the baseline, but not in the target (i.e., eliminated - by accident or design)
  • Something not in the baseline, but present in the target (i.e., new)

A "gap requirement" is anything that has been eliminated by accident, and therefore requires a change to the Target Architecture.

If the gap analysis generates gap requirements, then this step will ensure that they are addressed, documented, and recorded in the requirements repository, and that the Target Architecture is revised accordingly.
TOGAF ADM Preliminary Phase - Steps Phase A - Architecture Vision - Steps Phase B - Business Architecture - Steps Phase C - Information Systems Architecture - Steps Phase D - Technology Architecture - Steps Phase E - Opportunities and Solutions - Steps Phase F - Migration Planning - Steps Phase G - Implementation Governance - Steps Phase H - Change Management - Steps Requirements Management
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