A value stream in ITIL 4 refers to a series of steps an organization undertakes to create and deliver

services to its consumers. When improving a value stream, organizations need to map out the steps,

activities, and flows involved.

Identifying steps, activities, and information flows is part of the initial analysis of the current value

stream, often referred to as the "value stream walk." This involves observing and documenting the

current processes, which will later inform future improvements.

Option D ("Do the service value stream walk") is the correct answer because it involves analyzing the

current state of the value stream by identifying the existing steps and information flows​​​.

Incorrect Options:

Option A (Create a 'to be' value stream map) refers to designing a future state, which comes later in

the process.

Option B (Reflect on the value stream map) happens after the current state has been mapped.

Option C (Define the purpose of the value stream) is an earlier step before mapping begins.