Raw material stock for perfumers
A formula tells you what one hundred percent of a concentrate contains. Stock tells you whether you can make it on Thursday. Perfumers lose more production days to an empty bottle than to a wrong percentage, and the empty bottle is usually a surprise because the last deduction lived in a notebook, a group chat, or not at all. Stock management is the habit of writing the grams down in the same place as the material the formula already names.
One balance per physical bottle
Keep the inventory line on the material you weigh, not on a family of materials that smell related. A neat absolute and a ten percent dilution of that absolute are two bottles. They have two prices, two dilutions, and two balances. When a formula uses the dilution, the dilution's grams go down. The neat oil does not, unless you were the person who made the dilution and you record that transfer as its own use. Mixing those balances is how a studio believes it has fifty grams of something it has already poured into alcohol.
Name the material the way the label reads, including the supplier's grade when two lots are not interchangeable. A new purchase of a natural can replace the price on the material so every open formula costs itself at the new rate. The grams on hand are a separate number. Price and quantity answer different questions, and combining them into one "value of the shelf" figure hides a shortage inside a total that still looks healthy.
What to count, and what to leave out
Count the materials that enter a formula: aroma materials, solvents you dilute into, and the bases you treat as ingredients. You do not need a warehouse system for caps, cartons, and finished bottles on the same screen. Those matter to a brand, and they are a different list. The list that fails first, when one person is compounding several briefs, is the raw materials. If that list is honest, you can accept or delay a job before you tare a beaker.
Set a low-stock threshold per material at the amount that would stop a typical batch, not at zero. Zero is too late. The warning is only as good as the balance, so the deduction that matters is the one attached to a logged batch. When you pour, the grams leave the material and the batch stores what it consumed. The next formula you open already knows the bottle is lighter. Usage outside a batch, a sample sent to a client or a dilution you prepared for the shelf, should be written down the same day. A correction after you weigh the bottle is part of the record. Pretending the software was wrong, and then ignoring it, is how the number becomes fiction.
Before you promise a date
Open the formula, scale it to the weight you intend to make, and read the lines against what you hold. A formula of forty materials fails on the one line you cannot buy before the deadline. Do that check before you tell someone the perfume will be ready. Buying the missing material on the morning you meant to pour is how small studios lose a week, and it is an avoidable loss if the balance was updated the last time you compounded.
Lots belong in a note when a natural varies enough to change the smell. You do not need a new formula name for every drum. You need to know which lot went into which batch, so a later complaint can be traced to a material rather than to a percentage you already checked. The history on the material is that trace: the batches that used it, and the grams each one took.
How stock meets cost
The price per gram lives on the material. The formula multiplies that price by the dose. Stock does not calculate cost, but an unpriced material and an uncounted material are the same kind of gap: the page looks complete and the decision is still a guess. Fill prices for the materials you use every week first. An incomplete price list still tells the truth about the lines you have priced, and a stock list that only covers those same materials is already more useful than a perfect spreadsheet you do not open.
ScentLabs keeps this on the material record you already use in the formula. There is no second catalog to reconcile. When a batch is logged, the balance moves. When the balance crosses the threshold you set, you see it before the next brief. That is the whole system. The discipline is smaller than it sounds: weigh what you use, write down what you weighed, and look at the short bottles before you say yes.