For develop a measurement model of construction waste management, I use AHP for prioritisation the factors. Because I have to collect the data from experts, I'm looking for the right way to calculate the sample size.
Dear Kambiz,
There is no general rule for the sample size. It can be ranged from 5-9000.
The number depends on the aim of the research. If the survey is aimed at weighing or criteria the sample should represent the target population interested to those factors.
Attached please find a publication that might be helpful,
Rafik
Dear Rafik,
Grateful for your kind reply. I have to use expert and as I found so far, AHP doesn't need large sample size. However, I try to prove it by some methods. unfortunately I couldn't find any methods for it.
Hi
the sample size in AHP must me defined by statistical methods for example by Kokran
but 7 number is good, 7 is gold number and its suitable for more than 90% cases.
Hi
the sample size in AHP must me defined by statistical methods for example by Kokran
but 7 number is good, 7 is gold number and its suitable for more than 90% cases.
the experts must not be very much, because the opinion of experts will be variation that is not good.
I'm using a Morgan & Krejcie Table to determine a sample size. Hopefully, it can help u
Thank you M. Omidvari ! Would you please provide the reference of " 7 number is good, 7 is gold number and its suitable for more than 90% cases. " I appreciate your help!
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