Process Performance Example (Pp) & Ppk |Download Format

Process Performance Example (Pp) & Ppk |Download Format

Hello Readers! Today we will discuss and measure the process performance (Pp) and its index (Ppk) with industrial examples. If you are interested in gaining basic knowledge about Process Performance, then go through the below link and also on this platform you can download the Excel templates or formats. details have been illustrated with a Process Performance Example.

DOWNLOAD EXCEL TEMPLATE (Pp & Ppk and many more.)

Example-1:

We are having 100 numbers of readings of Total clay of green sand used in the metal manufacturing industry. Details of the reading are given below;

Sl.No. 1 2 3 4 5 6 7 8 9 10
Subgroup1 12.50 12.70 12.80 12.90 12.80 12.90 12.80 13.00 12.90 12.70
Subgroup2 12.50 12.90 12.90 12.90 12.80 12.90 12.70 13.10 12.90 12.90
Subgroup3 12.50 12.80 12.50 12.90 12.90 12.80 12.90 12.90 12.90 12.80
Subgroup4 12.80 12.80 12.80 13.10 12.90 12.80 12.80 12.80 13.10 12.80
Subgroup5 12.60 12.80 12.70 13.00 12.70 12.70 12.80 12.80 13.00 12.80
Table-1
11 12 13 14 15 16 17 18 19 20
12.80 13.00 12.70 12.90 12.80 12.70 12.90 12.80 13.00 12.70
12.80 13.10 12.90 12.90 12.80 12.90 12.90 12.80 13.10 12.90
12.90 12.90 12.80 12.90 12.90 12.80 12.90 12.90 12.90 12.80
12.90 12.80 12.80 13.10 12.90 12.80 13.10 12.90 12.80 12.80
12.70 12.80 12.80 13.00 12.70 12.80 13.00 12.70 12.80 12.80
Table-1
Process parameters;
Characteristics Total clay of green sand
Process: Sand Preparation Process
USL 14
LSL 12
Calculation:

The formula of Pp (Process Performance):

Pp = ((USL-LSL)/ (6 X S))

= (14-12)/ (6 X 0.13) = 2.64.

The Formula of Ppk (Process Performance Index):

Ppk = Minimum of PPU or PPL

PPU= ((USL-Average of average)/ (3 X S))

PPL= ((Average of average-LSL)/ (3 X S))

Ppk= Minimum of PPU or PPL = Min. (3.06, 2.22) = 2.22

Summary of calculation:
Process Performance Example
Process Performance Example

Note: Click here to know more about manual calculation and download the free excel template from the above link.

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