How a Stockout Shows Up Before It Happens in EDGEBIC

A stockout shows up in EDGEBIC weeks before the shelf empties, because the projection rolls the balance forward bucket by bucket and reports the first date it drops below safety stock, along with a below-safety flag and a days-of-cover read. In EDGEBIC by User Solutions, the whole point of a projected available balance is that the shortage is visible while there is still time to act. A stockout that surprises you on the day it happens is a planning failure; a stockout you saw four weeks out and chose how to handle is planning working.

This post shows the three signals that surface a stockout early and how to read them together. It sits under the EDGEBIC planning guide and builds on reading a projected available balance row by row.

The three early-warning signals

A projection carries three signals that a stockout is coming, in increasing severity.

Days of cover is the headline: current on-hand divided by the average daily demand rate across the horizon. It answers "at today's demand pace, how many days does stock last." A days-of-cover shorter than your replenishment lead time is the earliest and bluntest warning.

The below-safety flag fires on any bucket where projected balance drops under the safety stock level, while the balance is still positive. You have stock, but you have crossed your own alarm line. This is the soft warning: time to act, not yet in trouble.

The negative projected balance is the hard warning: a future bucket where committed demand exceeds projected supply outright. You would be short. It is allowed and meaningful, not a data error, and it names the exact bucket where the shelf goes empty if nothing changes.

Read together, these move from "watch this" to "act on this" to "this is the day it breaks," all before anything actually happens on the floor.

A worked warning: Widget A goes short in week 3

Take Widget A, make-to-stock, safety stock 50, opening balance 180, weekly buckets, greater-of consumption. Weekly demand of 60 across the horizon, with firm orders of 40 in week 1 and 70 in week 2, no incoming receipts.

Roll the balance forward:

The projected stockout date is week 3, the first bucket where the balance falls below safety. That is reported today, two weeks before it lands. Week 3 also goes negative, so the hard warning and the soft warning arrive in the same view. Days of cover, computed from 180 on-hand against roughly 60 units per week of demand, reads about three weeks, which against any lead time longer than that is itself a flag.

The planner sees all of this on the first projection run, long before a picker finds an empty shelf. The row-by-row reading guide walks the same figures column by column.

Why the balance is allowed to go negative

It would be easy to floor the projected balance at zero and call a shortage "zero stock." EDGEBIC does not, and the reason is that a negative carries information a zero would erase. A balance of −70 in week 4 tells you not just that you are short but by how much: 70 units. That magnitude sizes the fix. It also lets the shortage compound visibly across buckets, so a chronic gap looks worse each week rather than flatlining at zero. Suppressing the negative would hide the exact signal the projection exists to give. This is the same honesty behind negative available-to-promise: a negative is a warning, not an error.

From warning to action

An early warning is only useful if it leaves time to act, and the earlier signals do. When week 3 shows below safety, and if a reorder trigger is set, a suggested order quantity appears alongside it. Firm that suggestion into a build-to-stock order, and the next projection reads the resulting receipt as supply that lifts week 3 and every week after back above the line. The make-to-stock replenishment walkthrough traces that firm-to-receipt loop in full.

The days-of-cover signal drives a different judgment. If days of cover is 6 but your replenishment lead time is 10, a standard build firmed today lands four days after the shelf empties. The warning is real but a normal replenishment is too slow; the move is to expedite an existing build, pull in a due date, or split a rush order. Reading days of cover against lead time is what separates "firm the suggestion" from "expedite now."

Why projecting forward beats reacting

The alternative to an early warning is a reorder point that fires when stock actually hits a threshold. That reacts to the present. A forward projection anticipates the future, because it rolls known demand and known supply forward and reports the shortage the moment the causing orders are on the books. A large firm order due in week 5 pulls the stockout forward into view in week 1's projection, not in week 5 when it is too late to build.

This is also why the warning is capacity-aware in practice. The replenishment you firm in response is a real build-to-stock order that the finite capacity engine schedules against actual machine load. So the projection does not just tell you a stockout is coming; it hands the fix to a scheduler that knows whether the plant can actually build the replacement in time. That connection between the shortage signal and the production schedule is what makes the warning actionable rather than merely informative.

For a planner, the discipline is simple: watch days of cover against lead time, treat a below-safety flag as a prompt to act while the balance is still positive, and read a negative balance as the sized, dated shortage it is. Do that and stockouts stop being surprises. They become decisions you made weeks in advance, which is exactly what good inventory management for manufacturers and sound safety stock practice are supposed to deliver.

See the stockout warning surface on your own parts in the EDGEBIC platform overview, or contact US for a demo.