Daniel Högfeldt • Quality rate could also be called first time through. It is important to get a correct FTT number in the OEE calculation.
Arno Koch • I used Daniels example in a casting environment for a more generic description here.
First Time Through (=FTR – First Time Right)
In the quality Rate of OEE the minimal information that is needed to be collected is
- Good parts
- Rejected parts
Rejected parts can be categorized as:
- Scrap: Has to be destroyed
- Rework: Can be correct in order to still meet the specifications
- Sub-Spec: Does not meet the spec, but can be sold in a different market, b-product etc.
FTT is all the output that met the spec immediately. In terms of OEE: Good Product.
How is FFT Rate calculated?
The ratio of good parts to total parts will give the FTT rate.
On many machines, to detect this is not really an issue. Often it is straightforward to count the amount of scrap and total parts the machine made during the shift.
Other names for FTT
There are a lot of abbreviations; all reflecting to the same KPI:
- FPY = First Pass Yield
- FTR = First Time Right
- RFT = Right First Time
- DRIFT = Do it Right First Time
- TFT = Through First Time
Answer still not found?
If you checked all the sections in the Academy, yet still not found the answer to your question, ask it here.
To help you best, please be as specific as possible and please understand:
We do not want to reply to anonymous questions.