Parametric Analysis help!

#1
Hey there have a problem question: I'm producing 2 types of jackets short and long. 2 types of work done on them, cutting & sewing. Cutting department has 32 hours available & with Storm output analysis had an allowable minimum of 24 hours for the original solution to still be optimal.

The problem is to assume hours in cutting are reduced to 20 and perform parametric analysis to see how this will affect manufacture plan & profit. I've gotten the parametric analysis on Cutting Hours from storm below but I don't understand how to perform the formula provided in our book to get profit.

Current profit is: $1200 from 8 short jackets & 12 long jackets

New profit:
new objective function = 'From' Objective value in relevant range + Shadow price in relevant range * (New right-hand side value - 'From' RHS in Relevant range)

Any help appreciated


PARAMETRIC ANALYSIS OF RIGHT-HAND SIDE VALUE - CUTNGHRS
COEF = 32.000 LWR LIMIT = -1.000E+37 UPR LIMIT = 1.000E+37
------- Range ------- Shadow ---- Variable ----
From To Price Leave Enter
RHS 32.000 36.000 30.000 SLACK 2 SLACK 1
Obj 1200.000 1320.000

RHS 36.000 1.000E+37 0.000 ---- No change ----
Obj 1320.000 1320.000

RHS 32.000 24.000 30.000 SHORT JAKT SLACK 3
Obj 1200.000 960.000

RHS 24.000 0.000 40.000 LONG JAKT
Obj 960.000 0.000

RHS 0.000 -Infinity ---- Infeasible in this range ----



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I tried the formula above with these values:

New Objective Function (800) = 960 + 40 * (20 – 24)

Is this right?????????? So the new profit per week is $800???
 
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