Dec14 section b

with regards to question 2 part a)they asked us to explain briefly why senior stylist have been identified as the bottle neck and support using calculations.
what i done is i defined bottleneck resource described the ways in which we can determine it and how it limits the overall production within a business. i then went onto add both the times given in cuts and treatment department for all 3 suppliers individually. and i found senior stylist took 2.5 hours the longest making it the bottleneck. i actually showed all of this. will i get 4/4 for section a?

section b of q2)managed to get two tpars, but unfortunately cost per factor hour was wrong but throughput return per hour was correct. can anyone provide me with guidelines of how much will i lose in question q2 overall thanks.