3 replies to this topic

[tlp]

I can work with you, if you could elaborate. If possible write about what is the objective of your study? what parameters are you considering? what is it that you are measuring as your response? How many experiments can you conduct? Time available?
Please state your problem more clearly so that we can understand and support.

Regards
tlp

[tlp]

1. Identify the key parameter/s in your coating process that you would measure to say that your coating is successful. It could be (based on my very little knowledge ab’t coatings) coating thickness, Uniformity of the coat, its weatherability etc…
2.For each the parameters that you’re going to measure, Identify the key factors/parameters that has an effect on your measured parameter (parameters identified in the prev step). There’re several methods to identify and group these parameters like, cause&effects diagrams, FMEAs, process maps…etc. These are the tools, which should be used to hold discussions with the subject matter experts, friends, and colleagues to identify the parameters. These parameters can be classified as Controllable or Noise parameters. Like temperature, composition of the coat, duration of coating..etc can be controlled whereas your room weather conditions, operator skills, variations in coating material, etc are costly to control or cannot be controlled at your end are called Noise (got to live with it).

3. After identifying the key parameters and separating them as controllable or Noise parameters, you need to find out the real effect of key controllable parameters and their practical significance. For this, after you identify key 5-6 parameters/factors, design a 2 level fractional factorial expts to find out which parameters have a significant effect on the parameters that you measure to decide the success of coating. You can refer sixsigmafor designing expts. By this you have screened out the insignificant factors. Then, you can Optimize the settings for significant factors with optimization experiments (six sigma website can help you with this)

I tried in vain to attach only the flowsheet (not the file), therefore, I've given it in steps in the text format. This is a general and not a detailed and complete answer for your question. But I felt that it's not appropriate to have our discussion outside the forum,which I've learnt from the senior members here, I decided to give a very generic answer to your generic question based the information available to me.

Let me know if you've any clarification. Others please feel free to add to this answer or to bring out if you find faults in the answer.

I'll happy to know that if it is really of any use to you or else please excuse me for not being able to help you.

Regards
tlp