pg_0019
5.
Process Improvement
5.1.
Introduction
5.1.3.
What are the steps of DOE.
Key steps for
DOE
Obtaining good results from a DOE involves these seven steps:
Set objectives
1.
Select process variables
2.
Select an experimental design
3.
Execute the design
4.
Check that the data are consistent with the experimental
assumptions
5.
Analyze and interpret the results
6.
Use/present the results (may lead to further runs or DOE's).
7.
A checklist of
practical
considerations
Important practical considerations in planning and running
experiments are
Check performance of gauges/measurement devices first.
q
Keep the experiment as simple as possible.
q
Check that all planned runs are feasible.
q
Watch out for process drifts and shifts during the run.
q
Avoid unplanned changes (e.g., swap operators at halfway
point).
q
Allow some time (and back-up material) for unexpected events.
q
Obtain buy-in from all parties involved.
q
Maintain effective ownership of each step in the experimental
plan.
q
Preserve all the raw data--do not keep only summary averages!
q
Record everything that happens.
q
Reset equipment to its original state after the experiment.
q
The Sequential or Iterative Approach to DOE
5.1.3. What are the steps of DOE.
http://www.itl.nist.gov/div898/handbook/pri/section1/pri13.htm (1 of 2) [5/7/2002 4:01:43 PM]
Hosted free by FREE WEBSITES - Free Hosting with Online Website Builder!
