How to calculate First-time yield (FTY)

How to calculate First time yield (FTY)

In the food manufacturing industry, the typical yield is calculated as output/input. Input is the weight of the raw material used to produce one unit of output. Output is the weight of the product that was created.

Example 100kg input 90kg output = 90/100 = 90%yield

This type of yield does not give you an understanding of your process capability because it doesn't count rework, in food manufacturing many processes can rework defective products, products and materials that are put directly into the system. Bakery is a prime example, products such as pastry rolls can be put back into the sheeter and made again if there was a quality defect further downstream.

Have you ever processed a product at the correct planned rate, the line has not stopped but you have lost 10 min. When you put rework back into the process you are taking more time to produce.

What's the difference between Yield and FTY yield

Yield is a process yield.

FTY is a quality yield.

FTY Calculation

FTY is (Input - rework - scrap) / input

( 100 - 10 -10 )= 80/100 = FTY 80%

The difference between typical yield and FTY is 10%, a substantial amount.

First-time yield answers the question of How good are we at making out the product the first time.

Summary

Our yield is 90%, 10% waste process waste, but our First-time yield is 80%, 10% caused by a quality issue we had in ******* process and 10% from process waste.

https://www.mmsrd.co.uk/

#manufacturing #performance #Yield #improvement?