A consumption map is a simple diagram of all the steps customers must take to acquire certain goods and services. A delivery map is a similar diagram that incorporates all the steps producers and service companies must take to deliver these goods and services to customers.
In both illustrations, boxes representing individual actions are shown from left to right in process order. The size of each box corresponds to the amount of time required to perform the corresponding action; the shaded parts of the boxes represent the portion of that time that adds value within each step. Other important information, such as total time, value-added time, and at once good, is shown in a box for the total consumption and delivery process.
To complete the process, the two maps are displayed in parallel - one above the other. In this way, a complete consumption/delivery cycle is depicted. The combined maps can provide insight into the entire process for suppliers so that they can eliminate wasteful activities within the consumption and delivery cycle and develop a win- win collaboration by creating a Leaner version of their consumption and delivery maps.
An example of a car repair before Lean:
An example of a car repair after Lean: