Constraint combination exercise
You are working on a distribution plan for a warehouse network. The network has two warehouses (W1, and W2) and each can ship three different types of products (A, B, and C). W1 is small and can either ship 10 products A per a week or 15 products B per a week or 20 products C per a week. You are looking to minimize the total costs.
A Pandas DataFrame named demand is printed in the console and contains the monthly demand for each product. Additionally, the code of the PuLP model to initialize, define decision variables, objective function, and constraint so total shipment of each product equals its demand.
This exercise is part of the course
Supply Chain Analytics in Python
Exercise instructions
- Complete the code for the constraint that models the shipping limitations of warehouse W1 for 4 weeks.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Initialize, Define Decision Vars., Objective Function, and Constraints
model = LpProblem("Distribution Planning", LpMinimize)
wh = ['W1','W2']
prod = ['A', 'B', 'C']
X = LpVariable.dicts("ship", [(w, p, c) for c in cust for p in prod for w in wh],
lowBound=0, cat="Integer")
model += lpSum([X[(w, p, c)]*costs.loc[(w, p), c] for c in cust for p in prod for w in wh])
for c in cust:
for p in prod:
model += lpSum([X[(w, p, c)] for w in wh]) == demand.loc[p, c]
# Define Dependent Demand Constraints
model += ((1/10) * lpSum([X[('W1', 'A', c)] for c in cust])
+ ____ * lpSum([X[(____, ____, c)] for c in cust])
+ ____ * lpSum([X[(____, ____, ____)] for c in cust])) <= ____