IT Change Management (ITIL)
Standard IT change from RFC through CAB approval to post-implementation review
IT Service ManagementLead 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% |