The value stream map (sometimes also known as the "Learning to See" map or "Cartoon") has emerged as a very popular and clear way to illustrate the current and future state of a process. The method maps all the physical and information flows necessary to deliver what the customer requires. It is called a value stream map because it depicts the value-adding activities necessary to produce what the customer requires, in the sequence in which they happen. The value stream map differs from the process map in that it shows both the physical and information flows on one diagram, thus enabling you to see what the situation is and why this is the case.

Value stream mapping is quick to learn because it uses simple boxes to indicate stages, and other obvious symbols such as trucks, factories, and kanban cards. Typical symbols are shown in one of the content objects in this Knowledge Stream.

The point about these diagrams is that they are very clear and can be used for planning and participation meetings, from shop floor to top management. As a reference tool they can be placed on boards in meeting areas, and ideas can be added by Post-it stickers. Progress can be chartered.

The process involves identifying the value streams, creating the current state map, analysis of the current state map and creation of the future state map.

It is possible to map the value stream for the whole supply chain, including suppliers and customers. However, as a starting point for making improvements it is advisable to consider your organisation and the boundaries of authority the team has for making change.

Further reading:
Learning To See
Mike Rother & John Shook
ISBN 0-9667843-0-8
Available from The Lean Enterprise Institute.
Web site: www.lean.org