5. Process optimization

Before seeking to optimize Scrum, it's best to master its simple operation with iterations, deliveries and demonstrations at the end of each iteration, and to keep iterations going.

Once this process has been mastered, the next step is to reduce the time between iterations. The aim is to link iterations directly without stopping the "production chain". This brings us very close to Toyota's production principles (Lean), in particular the elimination of all waste (including wasted time).

The next step is to stop working in iterations, or at least to have several iterations running in parallel for the same team. The team works on features as they are specified. It is then up to the product manager to decide whether to deliver what is available according to specific customer needs, for example, one-week iterations for bug fixes, two-week iterations...