In a few words
The value stream is made up of all the activities implemented to produce and deliver a product or service. The visualization of value flows can be done through a flow mapping called value-stream mapping, or VSM.
We can say that the VSM is a snapshot of your flows. It’s a visual analysis tool that allows you to visualize the flow of information and materials within the framework of the production or service process for the benefit of the customer.
Value-stream mapping is considered one of the fundamental tools for your lean approach. Indeed, it allows you to chase waste by identifying its causes and thus build a target value-stream mapping—the ideal organization of all your flows.
The target value-stream mapping will be developed by determining the improvement projects to be carried out to improve performance.