Project schedules are built from relationships between work items. These relationships — called dependencies — control the logical order in which work can happen. Raytio PPM supports the four standard dependency types along with lead and lag modifiers.
Work items can be connected to each other in three distinct ways. Each serves a different purpose, and choosing the right one keeps plans readable and reporting meaningful.
Raytio PPM stores all the data you need to plan and track a schedule — dates, work, duration, dependencies, and progress — as independent fields. These fields are user-managed: changing one value does not automatically recalculate the others. This page explains what PPM provides and how the pieces fit together.
The PPM data model is built around four core concepts — Projects, Work Items, Milestones, and Baselines — with work items connected to each other through parent–child hierarchy, links, and dependencies. Understanding how these relate is the key to understanding how Raytio's project tracking works.