How do I measure schedule compliance for preventative maintenance?
The most common way to measure schedule compliance is by tracking your preventive maintenance jobs. PM tasks, like lubrication or replacing air filters, are set to reoccur at specific intervals. To track your schedule compliance, simply find out how many PMs you complete before their due date and compare those to the total scheduled. The formula would look like this:
(Work orders completed on time ÷ Total scheduled) x 100 = Schedule compliance percentage
Let’s take a look at a couple examples to really dig into this.
Example 1: Food Processing Plant
First, let’s take the example of a food processing plant. For the next week, the maintenance planner has 150 recurring PMs scheduled for various pieces of equipment. Each task is due at a certain date over the course of the week.
By week’s end, the maintenance team completed 100 of the orders scheduled. On top of that, only 75 of them were completed on time. The team’s schedule compliance would then be:
(75 PMs completed on time ÷ 150 PMs scheduled) x 100 = 50% schedule compliance
Any leftover work orders would still need to be completed, and that could make schedule compliance harder the following week.
Example 2: Automotive Parts Factory
Some facilities track schedule compliance on a daily basis rather than weekly. Supposing an automotive parts manufacturer has 30 PMs scheduled for its technicians to perform by the end of the day. After their eight hour shift is up and the work is reported, it turns out they completed 25 of them. Their schedule compliance for the day is:
(25 PMs completed ÷ 30 scheduled) x 100 = 83% schedule compliance
In terms of this metric, it doesn’t matter if the leftover work is completed the next day. It’s still late.
While a facility can still function at 40% to 90% schedule compliance, the world-class target is 90% and up.
There are a few reasons why a company might miss this target:
- Scheduling issues, such as scheduling tasks at opposite ends of the plant back to back
- Supervisors not honoring the schedule
- Workflow inefficiencies
- Lack of qualified personnel
- Unnecessary or over-frequent PMs
To improve your schedule compliance, you’ll want to take a look at these issues and find where you’re lacking.