This idea includes the ability to manage many hours cost category estimation on the same WBS activity when we change activity duration

The business logic behind this idea to manage cost estimates with different categories of hours (different rates for different skills involved in the same activities) that must not be lost if I have to change the duration of an activity (schedule time).

In general the impact is relevant for the use of the WBS as a tool to define and manage the cost estimate of the project activities.

It is now not possible to use the WBS to estimate and manage project activities but also project offers, the economic consequence is significant.

When the business model is based on project management, all project managers are affected by this issue.

Actual results: System automatically loses important details

Expected results: When we have more than one transaction type "Hour" with different project categories and we make some change in the "scheduling" view, the system should not merge them into the "cost estimates view".