Packaging order lot size and average stock on hand

Buying the same total quantity in larger deliveries can raise the amount of packaging held between receipts. Compare the repeating stock pattern before choosing an order lot. A lower number of purchase transactions does not by itself establish lower total operating cost.

Separate the order lot from the reserve

T901516PK is clear natural-rubber carton-sealing tape, listed at 2 inches by 55 yards and supplied as six rolls per case. One case and four cases therefore bring six and twenty-four rolls respectively. Keep that incoming quantity separate from any reserve the operation has deliberately chosen.

MIT's operations-management course distinguishes average cycle stock, Q divided by two, from reserve stock. The following example uses an idealized repeating cycle: consumption is uniform through time, the whole order becomes usable at once, and replenishment arrives exactly when the preceding cycle's supply is exhausted.

Compare two hypothetical receipt patterns

Assume usage equivalent to two rolls per day and a separate two-roll reserve that remains untouched. This is a continuous planning approximation to material consumption, not a statement that physical rolls are issued fractionally on a clock.

Over twelve days, both patterns supply twenty-four rolls. The smaller pattern receives stock at days zero, three, six and nine; the larger receives it at day zero. Exclude the next cycle's receipt at day twelve from this comparison. The larger lot reduces receipt events but raises average stock by nine rolls under these assumptions.

Plan space for the peak, not the average

Immediately after a receipt, stock including the reserve reaches eight or twenty-six rolls. Those peaks matter when assigning storage. Neither the five-roll nor fourteen-roll average describes the largest quantity that must physically fit. Check the actual case arrangement, access and storage conditions.

Uneven demand, partial receipts, delayed availability or reserve consumption changes the trajectory. Use a dated stock balance when those conditions apply. The simple halfway average should not replace the observed pattern.

Choose the lot with the whole operating requirement

Review T901516PK's exact six-roll case, then compare actual receipt work, space, purchase terms and demand. Keep the reorder trigger and delivery timing as separate decisions. This example explains the stock consequence of lot size; it supplies no Packrift delivery schedule, discount or guarantee against shortages.