In the ideal situation, the output of a
process is ‘zero defect’: this means whatever happens, all output is either
within the specification, or there is no output at all.
What are the conditions to achieve this?
The output needs to be clearly
defined:
Proces
Output
Spec A
Spec B
Spec C
All
specifications are known and controlled. (This sounds completely logical however
I am astonished how often even the basic specifications are either undefined,
wrongly defined, unknown, invisible or non-traceable!)
Proces
Conditions (Fixed)
In the process, all conditions to achieve a proper conversion
are known and it is possible to maintain those conditions at any moment:
Proces
Steering Parameter
The process has one (or very few) steering parameters:
If the
process needs to be directed, adjusted or otherwise regulated, there is only
‘one knob to turn’
Spec Input A
Spec Input B
Proces
The process has one or more inputs, all within spec;
Output
Spec Input A
Spec Input B
Proces
Steering Parameter
Spec A
Spec B
Spec C
Conditions
Concluding: In the ideal situation, for each different output:
All input is clearly specified
and always within spec.
All conditions are clearly
specified and maintained from first till last output.
The process is
regulated/steered with one (or just very few) parameters.
As soon as one of the above
parameters is out of spec, the process is being stopped and no of-spec product
will be produced.
As long as all parameters above
are being met, the output is 100% in spec.
