I Can Pour 500 Candles a Day but Only Pack 200 — How Do I Identify the Real Production Bottleneck Before Spending Money on Another Wax Melter?

Your output is the slowest stage

It feels productive to pour 500 candles in a day. Jars fill, the melter empties, the room smells right. But a customer cannot receive a candle that is still sitting unlabelled on a rack. If packing handles 200 a day, the workshop ships 200 a day, however fast the pouring bench is.

The difference does not disappear. Every day, 300 poured candles join the queue in front of packing. After a five-day week that is 1,500 candles waiting. They occupy curing shelves, block the next day's pour, and hold money you have already spent on wax, fragrance, wicks and jars.

In material terms, 200 packed candles of 200 g need 40 kg of scented wax a day. Pouring 500 uses 100 kg. At 8% fragrance load, the extra 60 kg is 55.2 kg of wax and 4.8 kg of oil every day turned into candles that nobody can ship yet.

There is a quality cost too. Candles that sit in a queue are handled more: moved off the setting table, shuffled on racks, restacked to make room. Each move is a chance to chip a rim, mark a top or knock a label out of line. The longer the queue, the more of your rejects are caused by waiting rather than by making.

Measure each stage on the same basis

Guessing the bottleneck is how people end up buying the wrong equipment. Measure it instead, using one real shift and the people who normally do the work.

The figures above are an example, but the pattern is common. Each stage after pouring is slower than the one before it, so the work backs up in steps. The first place anyone notices is usually the packing table, which is also the place that actually is the constraint.

Why another melter makes this worse

A second melter would raise melting from 500 to perhaps 1,000 candles of wax a day. Pouring would still manage 500, and packing would still manage 200. You would have spent money to improve a stage that was never limiting.

It can also do harm. If staff feel that more wax is ready, they pour more, the queue grows faster, and curing shelves fill up. Scented wax held hot for long periods waiting for pourers can also lose fragrance, since oils are volatile and repeated heating is not neutral. More capacity at the wrong stage turns into more waiting, not more shipping.

There is also a safety angle. More melters on the same bench mean more hot wax standing in open vessels and more electrical load on the same circuit. If the extra capacity is not needed, that is risk added for nothing. Check what your wiring can carry before adding any heating equipment, whether or not it turns out to be the bottleneck.

Finally, it hides the lesson. If output stays at 200 after the purchase, the natural conclusion is that the new melter was the wrong size, and the next spend is a bigger one. The measurement sheet stops that loop before it starts.

Break packing into its steps

Packing is rarely one task. It is lidding, labelling, wrapping, inserting into a box, adding a card, closing the box, putting boxes into a carton, sealing and counting. Time each one. Usually one or two steps take most of the time.

Count errors while you time the steps. If one packer is fast but mislabels a fragrance now and then, the speed is not real, because a mislabelled corporate carton costs more to fix than the time saved. Record units per hour and errors per hundred together.

Anything that can be done before a candle exists should be done before it exists. Boxes can be folded and labels printed during setting time, when pourers are otherwise waiting. That moves work out of the constraint and into slack time elsewhere.

Wick preparation is the same idea further upstream. Ready-made braided wicks take a manual step out of the day entirely, and those minutes can be spent at the packing bench instead.

Rebalance people before you buy anything

Suppose three people pour 500 a day, about 167 each. Move one pourer to packing. Pouring drops to roughly 333 a day. If two packers manage 200, each is packing about 100, so three packers manage about 300. The two stages are now close: roughly 300 to 333.

Moving a person is not free, so plan it. The pourer who moves needs a written packing SOP, the same checks as existing packers and a clear handover of which batches are theirs. Keep the batch code on every tray so that when candles change hands between pouring and packing, nobody loses track of which melt they came from.

Output rises from 200 to about 300 a day, a 50% increase, with no new equipment at all. QC and labelling then become the next limits in the example sheet, so you measure again and move the next person or prepare the next component.

When equipment does become the answer

Suppose the line is level at about 300 a day and you need 500. Now the measurements guide the spend. If packing is still the lowest, look at packing aids before anything else: a labelling jig, a dedicated packing table with components within reach, a carton-sealing tool. If pouring becomes the lowest, more pitchers and a second pourer are cheaper than a new melter. Only when melting itself is the lowest measured figure does another melter earn its place.

When every stage is roughly level and the whole line is still too slow, then equipment becomes the answer, and your measurements will tell you which one. At that point a purchase is a decision based on data rather than on which part of the room looks busiest.

Where this page fits

CSI already has guides that cover parts of this question. This page takes the production-floor angle; these go deeper on the rest:

Three things to buy for this job

Frequently asked questions