Scheduling and supplies

Scheduling connects demand to capacity. Supplies should never surprise you mid-week. Build the week backward from committed customer promises: what is due, what capacity it needs, and what materials must already be on hand. Then place the flexible work into the gaps. Set par levels for consumables and a reorder point that accounts for lead time, not just quantity. A frequent scheduling mistake is filling every open hour with flexible work before committed promises are placed. This feels productive because the calendar looks full, but it means the first schedule change bumps a paying customer instead of the flexible task that should have absorbed the shock. Always place committed, dated promises first, then let flexible work fill whatever time remains. Deciding what counts as a par level or reorder point is really a decision about how much surprise you can tolerate. A business with a forgiving supplier and short lead times can run leaner stock. A business whose supplier sometimes doubles its lead time needs a bigger buffer, even if that ties up more cash in inventory. The right number depends on your actual supplier behavior, not a general rule. You can tell a schedule is working when the week rarely needs last-minute rearranging and staff are not regularly told to drop one job for another. A struggling schedule shows up as frequent apologies to customers, rush orders for supplies, and a team that stops trusting the plan because it changes so often. When you see those signs, the schedule was probably built around available time instead of committed promises. A print shop once scheduled retail walk-ins first because they paid immediately, and pushed a wedding invitation order to the end of the week. The order missed its mailing deadline. After the mistake, the shop switched to scheduling dated commitments first regardless of how the payment arrived, and walk-in work absorbed whatever time was left. The recovery cost one refund and an apology, but it fixed the underlying ordering problem for good.

Key takeaways

• Build the week backward from committed customer promises: what is due, what capacity it needs, and what materials must already be on hand.
• Set par levels for consumables and a reorder point that accounts for lead time, not just quantity.
• Lead time is what determines when you must order, not how much you use.

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