Mandatory vs. Preferential Schedule Logic

• Website: LinkedIn

• Date Published: 20-May-26

• Type of material: pdf & webpage

• URL: https://www.linkedin.com/feed/update/urn:li:activity:7462925987786268673/

Overview:

Did you know that the four types of schedule relationships (finish-to-start, start-to-start, finish-to-finish, and start-to-finish) belong to either of two classes of schedule logic: mandatory or preference logic?

In this post, Rens van Arkel distinguishes mandatory schedule logic, driven by physical, legal, or contractual requirements, from preferential logic, which reflects flexible delivery strategies and resource constraints. Identifying mandatory logic first establishes firm schedule boundaries, while preferential logic can then be adjusted to explore alternative strategies, improve flexibility, and uncover opportunities for fast-tracking or optimisation..