Constraint in Integer Programming

[fexie11]

Dears,

I have this task to make course schedule. The schedule should be in consecutive and this is the constraint that makes the schedule in consecutive (X₁₁₁, X₁₁₂):


i = course (1,...,20)
j = days (1,...,5)
k = periods (1,...,11)
k = time slots (1,...,11).....................................edited
w_i = number of periods required for course i (2 periods or 3 periods)
l = 2,..,w_i
Xijk = 1 if course i is assigned to the j_th time slot of day k = 1 if course i is assigned to the kth time slot of day j ...............................edited

= 0, else​

Can someone explain to me what does the constraint means?



Best Regards.

 

[fexie11]

I'm sorry i mean:

k = time slots (1,...,11)
X_ijk = 1 if course i is assigned to the k_th time slot of day j

 

[Deleted member 4993]

I'm sorry i mean:

k = time slots (1,...,11)
X_ijk = 1 if course i is assigned to the k_th time slot of day j

Please repost with corrections in their correct places.