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AEAP and ALAP

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QXL Stat Tools Tab > DSM > AEAP and ALAP

A DSM matrix can be reordered using As-Early-As-Possible (AEAP) and As-Late-As-Possible (ALAP) rules.

AEAP and ALAP are partitioning methods which try to bring the matrix to the lower triangular form. The difference between this method and the paths searching method is that AEAP and ALAP provide information about process hierarchies.

AEAP and ALAP break the DSM matrix into levels. A level is a group of tasks where any two tasks in the same level are not connected to each other (they are independent) or they are in a cyclic loop.

In the AEAP matrix, a task starts immediately after all its inputs (precedent tasks) are available.

In the ALAP matrix, a task is delayed to the extent that it does not delay the entire project.

Example

Before partitioning...

After partitioning...