According to the best practice guide, this approach is derived from James Martin’s The Great Transition. The value stream is an end-to-end collection of value-adding activities that create an overall result for a customer, stakeholder, or end-user.
The value-adding activities are represented by value stream stages, each of which creates and adds incremental stakeholder value from one stage to the next.
Here is the metamodel of the Value Stream advanced by the TOGAF 10 Series Guide:
How to build a Value Stream Diagram
1 Create a Value Stream Diagram.
2 Draw the Value Stages of the Value Stream.
3 Draw Value Stage Flow lines between the Value Stages.
4 Encompass the Value Stages within the Value Stream they belong to – when you draw a Value Stream symbol over Value Stages, the Value Stages are listed in the Value Stream’s definition, in its Value Stages tab.
5 Draw the Stakeholders or Actors affected by each Value Stage, and create a Stakeholder Participates in Value Stage line between the Stakeholder and its Value Stage(s).
Note The TOGAF 10 Series Guide on Value Streams describes Stakeholders involved in the Value Stream. However, the TOGAF 10 metamodel does not have Stakeholder in it; instead, it has Actor. You can use either concept – in System Architect, the Stakeholder definition is related to Strategy Maps and Balanced Scorecards.
6 Place Business Capabilities on the diagram that each Value Stage maps to.
7 Draw Capability Maps to Value Stage relationships.
Note You can also create the relationships in the Value Stream/Capability matrix (to access, select View > Matrix Browser).
8 Within each Capability Maps to Value Stage relationship, specify how well the Value Stage maps to the Business Capability in the How Good a Mapping property on the Mapping tab.
9 Hide the Value Stage Flow lines and hide the Capability Maps to Value Stage lines by right-mouse-clicking on the diagram workspace, selecting Hide/Show Relationship Lines, and then toggling off those line types.
10 On the Value Stream Diagram, select View > Heatmap Manager.
11 In the Heatmap Manager, toggle on all of the Value Stage to Capability analytics, and then click the checkbox in the upper-left of the Heatmap Manager (labeled Click to apply the selected analytics) to run them:
•No Gap – Value Stream-Capability.
•Significant Gap – Value Stream-Capability.
•Some Gap – Value Stream-Capability.
The business capabilities will be colored to reflect how well they satisfy the Value Stage they are related to (as pictured in the diagram at the beginning of this topic).
