# Query regarding RTY study(Rolled Throughput Study)

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• #38407

AMIT KUMAR
Participant

Dear Sir!
Myself Amit Kumar presently working in Tata Johnson Controls Automotive Limited, India.
Sir! Presently I am working on RTY (Rolled Throughput Yield) Study of our plant. I have little confusion in calculating Final RTY of  plant production.  I am expecting help from you.

Production Description :
We are manufacturing Seating Sets for various cars. For this, we have two assembly line:
One for Rear Seat and other for Front Seat. There is no dependency on each other for production of seat. These two are totally separate.
As in a general car , there are two FRONT seat (Driver & Co-Driver) and one REAR seat, So we assemble 2 FRONT seat on front line for every REAR seat on rear line.

Problem :
Suppose for Front Seat Assembly line, RTY = F

And for Rear Seat Assembly Line, RTY = R

Then Final RTY of our production will be =————???

With Regards!
Amit Kumar

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#114880

indresh
Participant

if we treat the entire assembly line 1 (manufacturing front seats) as single process with RTY =F (assume its 80%)
similrailry for the rear one RTY as =R (assume its 75%)
total shall be .75*.80= .60=60%
but if we wanna compare the RTY for these assembly lines then normalisation is required for each process taking number of steps into considerations
hope this helps

0
#114889

Mikel
Member

Why do you want to do this? Why don’t you spend your time improving the yield on the line which costs you the most waste instead?

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