Running appears as a class of time within a Reason Report to highlight opportunities where the line is not performing at the desired speed.
Before delving into the “Running” category in a Reason Report, let’s understand the following:
- What does a Reason Report tell us?
- What does Lost Time mean?
What can we analyze from a Reason Report?
- It allows the users to identify inefficiencies and unproductiveness
- It presents the reasons for downtimes, slow running, and setup
- It highlights opportunities, for example, time lost while running or when a line was not running at the desired rated speed.
What is Lost Time?
Lost time is any missed opportunity to make products. That means when the machine state is in downtime, setup, or running slow; it will be identified as lost time as the line was not able to produce as many units as it could have.
So why is Running in a Reason Report?
Given the fact that the Reason Report provides a summary of opportunities for the business, it may appear strange that Running appears as a class of time within this Report.
However, if we take a deeper look at the OFS speedometer we can see that even within the dark green (normal running) range, there is opportunity for improvement.
Lose Time: When the needle is within the dark green range but behind the desired speed (green triangle), this is counted as lost time as there is potential for the speed to be faster.
Win Time: When the needle is within the dark green range but ahead of the desired speed, this is counted as time gained back as the line is running faster than expected.
So when the needle is running behind the rated speed (speed loss) this is reflected in a Reason Report as ‘lost time’. In contrast, if the needle is running ahead of the desired speed, this is considered as a speed gain and is shown in negative numbers (as seen below) because it is negating lost time.
In conclusion, when trying to understand lost time within the context of Running, keep in mind the following:
- If speed losses are occurring there is an opportunity to improve and reach desired speed
- If consistently running faster than expected, consider whether the rated speed needs to be adjusted i.e. increased