Library · Stock / inventory · How to run this
Will this SKU cover the window you named?
Days of cover is units on hand divided by sell-through per day for this SKU. The next question is whether that cover lasts through a named sales window — a promo, the days until inbound lands, a peak week you already marked on the calendar. Headroom or shortfall is in units, not a slogan.
Pair: Cover vs a named window on Stock.
This is not cut ads before you stock out. That calculator takes daily ad spend and shows risked spend into empty. This one takes the window you name and shows whether cover covers it.
How to read it
Type on-hand for the SKU, current units per day, and the length of the window in days. Read days of cover. If cover is shorter than the window, the shortfall is how many units you still need at this velocity. If cover is longer, the headroom is spare units through that window.
We do not invent a two-week threshold chip. Your window is the bar.
What not to do
Do not average the catalog so a dead hero looks fine. Do not count on-order as shippable today. Do not paste a default fourteen days because a slide said so.
Which units may enter on-hand when you run FBA and a 3PL: FBA vs 3PL cover. Two 3PL warehouses of the same type: ads ship-from cover. ASN / receiving: inbound is not cover. Next factory floor: MOQ vs shortfall.
Related: Stock, cut ads before you stock out when spend is the next decision, landed COGS when the unit cost is the next decision, lot expiry hold when the lot date is the next decision.
Procedure
- Take on-hand for this SKU.
- Take current sell-through per day.
- Name the sales window in days.
- Read cover, then headroom or shortfall units versus that window.
Failure modes
- Counting on-order as on-hand.
- Averaging SKUs so a dead hero looks covered.
- Pasting a default fourteen-day bar because a slide said so.
Worked example
None on this page yet. When one lands it will be a real case: what broke, the number, and what changed. Not a composite.
Glossary
- Cover
- Units on hand ÷ sell-through per day. Compare to a window you named — not a fixed two-week chip.
- Named window
- Promo length, inbound lead days, or peak week the operator marked. Typed, not invented.
Work with us — We run this job on your accounts. Services
FAQ
- Can I count on-order units as cover?
- No. On-order is not on-hand. Cover is what you can ship today.
- Is this the same as cutting ads before a stockout?
- No. That page prices ad spend into empty. This page asks whether cover lasts through a window you named.
- What window should I use?
- The one you actually care about — promo length, inbound lead days, peak week. Type it. We do not fill fourteen days.