According to The Goal Video:

Meeting the deadline for Bucky Burnside's order is very important because:

There is a large penalty for delivering the order late

Mr$.$ Burnside's company is a new customer they are trying to impress

Mr$.$ Burnside's company is paying a large price premium to have the order completed on time

The product that Mr$.$ Burnside's company orders is the largest profit product the firm sells

If they can't meet the order the factory may be closed