Last Planner System (LPS) Skill for Foreman OS

Overview

The Last Planner System is a Lean Construction Institute methodology that transforms construction planning from a top-down push system to a collaborative, constraint-driven pull system. This skill enables field superintendents to implement reliable weekly work planning at the front line of construction—where the actual work happens.

Core Principle: Reliable Promising

Traditional project management asks: "What work is scheduled this week?" Last Planner asks: "What work can we RELIABLY PROMISE to complete this week?" This distinction is critical. A commitment is only made after:

1. All constraints are identified and cleared
2. The responsible trade foreman has reviewed the work scope and confirmed feasibility
3. Required resources (labor, materials, equipment) are available or will be available by the work start
4. Prior work is complete and accepted
5. Clear, current design information exists

A reliable promise is not optimistic; it is a commitment that will be honored more than 80% of the time. This builds trust in the schedule and enables downstream trades to plan their own work confidently.

Why Last Planner Matters