Planned does not mean ready

A job can have a scope, duration and scheduled date and still not be ready to start.

Maintenance systems often treat planning status as if it were a single property of the work order. Operational readiness is more demanding.

Readiness is a relationship between constraints

A job may depend on:

• the correct people and competencies;
• parts and repairables;
• tools or lifting equipment;
• site access;
• isolations and permits;
• contractor mobilisation;
• prerequisite work;
• production release of the asset.

Until those conditions are satisfied, the planned date is only an intention.

scope
+ labour
+ materials
+ access
+ controls
+ dependencies
= executable work

Representing readiness explicitly makes weekly schedules and shutdown plans more useful because the system can distinguish work that is merely listed from work that has a reasonable chance of being executed.