What Is PPC in a Construction Project?

In a construction project, tracking the schedule is not enough if you do not know how reliably agreed tasks are actually completed. This is exactly the problem that the PPC metric solves in a simple and practical way.

PPC stands for Percent Plan Complete. The metric shows how many of the tasks promised in the weekly plan were completed as agreed.

What Does PPC Mean?

PPC measures the reliability of the weekly plan. If ten tasks are agreed at the beginning of the week and seven of them are completed as planned, the PPC is 70 percent.

PPC does not measure how busy the construction site is. It measures how well agreed tasks are completed as planned.

How Is PPC Calculated?

PPC is calculated by dividing the number of completed tasks by the number of planned tasks and multiplying the result by one hundred.

Esimerkiksi jos viikkosuunnitelmassa oli 20 tehtävää ja niistä 16 valmistui, laskelma on:

Tämä tarkoittaa, että 80 prosenttia viikon aikana luvatuista tehtävistä toteutui suunnitellusti.

Why Is PPC Important in a Construction Project?

On a construction site, problems often arise because tasks are started before their prerequisites are in place. Materials may be missing, plans may be incomplete or the preceding work phase may not be finished.

PPC helps show how reliably a construction site can execute its own plans. When the metric is tracked weekly, the project team quickly gains visibility into where production problems originate.

What Does a Low PPC Indicate?

A low PPC does not automatically mean that the site is performing poorly. It often indicates that planning is not realistic enough or that execution constraints have not been removed in time.

• Too many tasks are committed to in one week
• Materials have not arrived on time
• Plans or approvals are missing
• Previous work phases are delayed
• Subcontractor resources are insufficient

The purpose of PPC is not to assign blame, but to help identify recurring constraints and improve production reliability.

What Does a High PPC Indicate?

A high PPC indicates that weekly planning is realistic and that task prerequisites are in place. It also means that project participants are more committed to shared goals.

However, a high PPC does not mean that the schedule no longer needs management. The metric should be used as a tool for continuous improvement, not merely as a reporting figure.

How Can PPC Be Improved?

PPC improves when site planning becomes more realistic and constraints are removed before they affect production.

• Plan only tasks that can actually be executed
• Check materials, plans and work areas in advance
• Involve subcontractors in weekly planning
• Track the reasons why tasks were not completed
• Use lookahead planning to remove upcoming constraints

PPC and the Last Planner System

PPC is a central part of the Last Planner System. In Last Planner, project participants take part in planning, commit to executable tasks and track how well those commitments are fulfilled.

This makes scheduling more practical. Instead of only tracking the long-term schedule, the site evaluates each week what can be done, what is promised and what was actually completed.

Summary

PPC is a simple but powerful metric for construction project production control. It shows what percentage of agreed tasks were completed as planned and helps identify recurring production constraints.

When PPC is tracked regularly, the site can improve planning reliability, reduce disruptions and make the schedule more predictable.