First pass yield (FPY)

What is first pass yield?

First pass yield is a measure of quality and productivity. It's calculated by dividing the acceptable parts by the total number of parts produced during manufacturing. The higher your first pass yield, the better your product overall.

Why is first pass yield used?

First pass yield is a measurement of the quality of a manufacturing process. It's used to determine how many parts can be made without defects, and it's often reported as a percentage.

How is first pass yield calculated?

First pass yield is calculated by dividing the number of good parts (i.e., usable and sellable units) by the total number of parts (i.e., the total number of units). It's based on the percentage of good parts produced, and it looks like this:

First pass yield


Good Parts ÷

Total Parts

× 100

Let’s say you make 100 useable and sellable parts in one day, but the total number of parts made in that day is 125. That means 25 parts made that day are defective (for one reason or another) and can not be sold. You would take your 100 usable parts and divide it by 125, which is your total to get 0.8. You would then take 0.8 and multiply that by 100 to get your FPY as a percentage, which in this example is 80%.

The best way to measure first pass yield is by using a software system that automates the calculation of the FPY, allowing you to see real-time data and historical trends over time.

What is considered a good percentage for first pass yield?

The percentage really varies from industry to industry. A general first pass yield (FPY) of over 95% is considered excellent for any kind of manufacturing. Typically more than 90% is considered good.

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What are the benefits of measuring first pass yield?

First pass yield is a measure of process efficiency and quality, and it can be used to identify areas where improvements can be made.

The benefits of measuring first pass yield include:

  • Improving product quality by identifying defects that were not caught during the manufacturing process (and therefore were not removed)
  • Providing insight into how well your employees are performing their jobs in relation to other employees or groups within your organization

What is the difference between first pass yield and rolled throughput yield?

First pass yield is a measure of quality. It's defined as the percentage of parts produced correctly on the first try and can be used in further production. Rolled throughput yield is a measure of efficiency, and it measures how many parts you can produce per hour using your machines, tools, and labor force.

Measuring first pass yield can improve your manufacturing processes and increase profits

First pass yield is a great way to measure how well your manufacturing processes are working. By measuring first pass yield, you can find areas to improve your manufacturing processes and increase profits. The good news is that it's easy enough for anyone in your company (even if they don't have any experience with math) to calculate this number by using a simple spreadsheet or app.

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