(Parts per million) is a measurement used
by many customers to measure quality performance.
One PPM means one (defect or event) in a
million or 1/1,000,000
the past a good supplier would have a defect
rate of less than 1%, (10,000 PPM). However,
production and quality control procedures
have improved and expectation was increased
to 0.1% or 1,000 PPM. Now the rate for most
connectors and components is targeted at
25 PPM or 0.0025%
calculate: For example, if you had 25 pieces
defective in a shipment of 1,000 pieces.
25/1000= .025 or 2.5% defective. .025 X
1,000,000 = 25,000 PPM.
the PPM Calculator:
to calculate PPM is best explained in an
example. Let's say, a manufacturer produces
10,000,000 parts per year for their customer.
The manufacturers plant operates around
5 days a week, 50 weeks per year or 250
days a year in most cases. Let's assume
most customers requirements are 25 PPM.
That means that the manufacturer would be
allowed 25 pieces for every 1,000,000 pieces
or 250 defective parts per year. Or to put
it another way, one bad part per day! In
this example we did not say one bad part
per day per person or job, or shift or machine.
One bad part for the entire plant for 24
hours! This is what Xmultiple has achieved
and we meet our customers expections for
the lowest possible defective rates.
rate is possible and even though many manufacturers
still are using the same manufacturing methods
which were responsible for the 5 or 10%
scrap which use to be accept.
monitoring and measurement systems we have
today have paved the way for improved quality.
We can now control the process in order
to control the quality. Quality can not
be inspected in after the fact. It is the
result of careful planning, design, and
control our defective rate, Xmultiple uses
a systematic and scientific approach to
design and manufacturing in our facility.
In addition, we use a high level of training
of our personnel in the use of the tools
and methodology so we can achieve these
low PPM rates.