IT Change Management (ITIL)

Standard IT change from RFC through CAB approval to post-implementation review

IT Service Management
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Lead Time

327.75h

Cycle Time

6.75h

Wait Time

321.0h

PCE

1.9%

Stages

8

Bottleneck

Post-Implementation Review

Value-Add vs Non-Value-Add

Value-Add (VA)

An activity is value-add if it meets all three criteria:

  • The customer is willing to pay for it
  • It transforms the product or service
  • It is done right the first time

Examples: Assembly, diagnosis, treatment, coding, machining, testing

Non-Value-Add (NVA)

Activities that consume time or resources but don't add value from the customer's perspective:

  • Waiting — queues, approvals, batching delays
  • Transport — moving materials or information
  • Motion — unnecessary movement of people
  • Rework — correcting defects or errors
  • Over-processing — doing more than required

Note: Some NVA is necessary (compliance, safety). Target unnecessary NVA first.

Process Timeline

Value-Add vs Non-Value-Add

Bottleneck Analysis

Stage Efficiency

# Stage Cycle (h) Wait (h) VA Resource Defect % Efficiency
1 RFC Submitted 0.5 0.0 VA Change Requester 12.0% 100.0%
2 Change Categorisation & Risk Assessment 0.5 8.0 VA Change Manager 8.0% 5.9%
3 Technical Review & Test Plan 2.0 24.0 VA Technical Lead 10.0% 7.7%
4 CAB Review & Approval 0.5 72.0 NVA CAB 5.0% 0.7%
5 Implementation Window Scheduled 0.25 48.0 VA Change Manager 3.0% 0.5%
6 Change Implemented 2.0 0.0 VA Engineer 8.0% 100.0%
7 Validation & Smoke Testing 0.5 1.0 VA Engineer / QA 6.0% 33.3%
8 Post-Implementation Review 0.5 168.0 VA Change Manager 4.0% 0.3%