ITIL4-CDS Create, Deliver and Support Practice Question
An organization is implementing value stream mapping to analyze its software release process. Which TWO key metrics are typically captured during value stream analysis to identify bottlenecks and inefficiencies? (Choose two)
⚠ Common exam trap
Candidates often select output metrics like lines of code or sheer volume of deployments instead of true flow metrics like lead time and flow efficiency that directly expose idle wait states and bottlenecks.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Lead time
Lead time measures the total time from the initial customer request to the final delivery of value, while flow efficiency measures the ratio of active work time to total lead time. Tracking both metrics reveals where work is sitting idle in queues, helping teams target bottlenecks and improve overall velocity.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Lead time
Why this is correct
Lead time captures the total elapsed time from the initiation of a request to its fulfillment. It is critical in value stream analysis because it exposes how long customers wait for value and highlights systemic delays across the workflow.
- ✗
Mean time between failures (MTBF)
Why it's wrong here
MTBF is a reliability metric measuring the average operational time between hardware or software failures. While important for availability management, it is not a core metric used within value stream mapping to analyze workflow bottlenecks.
- ✓
Flow efficiency
Why this is correct
Flow efficiency measures the ratio of value-adding time to total lead time, exposing wait states and bottlenecks in the release value stream. It satisfies the metric requirement by quantifying how much of the end-to-end duration is genuinely productive work.
- ✗
First contact resolution (FCR) rate
Why it's wrong here
FCR measures the percentage of service desk incidents resolved during the initial customer interaction. This operational metric is specific to incident management performance rather than end-to-end software delivery value stream analysis.
- ✗
Net promoter score (NPS)
Why it's wrong here
NPS measures overall customer loyalty and satisfaction based on survey feedback. Although it indicates general sentiment, it does not provide the granular operational timing data needed to identify specific bottlenecks in a value stream map.
About these practice questions
This ITIL4-CDS question is part of Courseiva's 155-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official PeopleCert/AXELOS exam blueprint
This ITIL4-CDS practice question is part of Courseiva's free PeopleCert/AXELOS certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the ITIL4-CDS exam.