Unidirectional Data Sharing Principle

For each field or category, data is shared in only one direction. A PPM category that is used to publish information to P6 cannot be updated with information from P6. A PPM category that gets updated by information from P6 cannot be set to publish information to P6. Similarly, P6 fields that update their data to PPM categories cannot receive data from PPM, and P6 fields that receive data from PPM cannot be set to update categories.

Note:

Though it is technically possible to enter information manually into a category that gets updated from P6, this information is overwritten the next time P6 updates PPM.

If in certain projects you want the information in a specific category to be derived from P6, while in other projects you want information to be entered directly into PPM, use a master category technique. For example: If you want some projects to display a planned start date as it is entered by the project manager in P6, and in other projects you want this date to be entered directly into PPM, do the following:

1. Create a category called P6 Planned Start Date to receive the planned start date from P6.
2. Create another category called PPM Planned Start Date to receive the start date, as entered in PPM.
3. Create a category called Master Source that allows a user to select P6 or PPM from a value list.
4. Create a category called Planned Start with a function that determines whether to get the category value from P6 Planned Start Date or PPM Planned Start Date, based on the Master Source category.