topic Re: Process Capability study doesnt display all parameters from Stdf file in Discussions

Process Capability study doesnt display all parameters from Stdf file

steo45 — Sat, 10 Jun 2023 23:31:02 GMT

i have a stdf file and when doing process capability study. for some reasons some parameters are missing. Any idea how to fix it?

Re: Process Capability study doesnt display all parameters from Stdf file

txnelson — Wed, 02 Jun 2021 20:34:38 GMT

I would start by examining the JMP data table after you have inputted it, using whatever STDF reader you are using. Please verify that columns are not empty and that the columns that you want to be analyzed are numeric and continuous.

Re: Process Capability study doesnt display all parameters from Stdf file

steo45 — Thu, 03 Jun 2021 01:27:50 GMT

i checked the data seem correct. no empty columns or anything i also tried using this script instead of doing it interactively and had the same issue. the summary report drops some test too. im unsure if im picking the correct option

Names Default To Here( 1 );
dt = Open( "$SAMPLE_DATA\semiconductor capability.jmp" );

// Create a complex name for a column to make sure it will be
// processed correctly
dt:NPN1 << set name( "NPN1-7/Best" );

// Get a list of columns to be used
colList = dt << get column names( continuous, string );

ProcessFunc = Function( {TheList},
// Move them into a single literal string of the format required
// for the Process Variables element in the Process Capability
// platform
TheVars = ":Name(\!"" || TheList[1] || "\!")";
For( i = 2, i <= 10, i++,
TheVars = TheVars || "," || ":Name(\!"" || TheList[i] || "\!")"
);

// Run the Process Capability platform, using the literal
// string "TheVars"
Eval(Parse("dt << Process Capability(
Process Variables( "|| TheVars|| ") ), Capability Index Plot( 1 ), Within Sigma Capability Summary Report(1)
);"));
);

Return = ProcessFunc( colList );

Re: Process Capability study doesnt display all parameters from Stdf file

txnelson — Thu, 03 Jun 2021 01:44:37 GMT

There are 2 issues.

Your script limits the output to 10 column

For( i = 2, i <= 10, i++,
		TheVars = TheVars || "," || ":Name(\!"" || TheList[i] || "\!")"
	)
;

Not all of the columns have both USL and LSL assigned

Re: Process Capability study doesnt display all parameters from Stdf file

steo45 — Sat, 05 Jun 2021 01:26:01 GMT

thanks for the reply jim. i'm not sure what i'm doing wrong with this one.i tried to do it manually but it still looks like its skipping about 200 processes. there are some process limits missing about 8 from what i see. however the summary comes in with more than 518 missing including 6 that are missing limits

Total processes: 1741

Total no limits : 8

Total Process in summary: 1223

Re: Process Capability study doesnt display all parameters from Stdf file

txnelson — Thu, 03 Jun 2021 21:48:20 GMT

My examination of your included data shows that 248 columns that are not analyzed in the Process Capability platform are being excluded because they have zero for all of their rows.