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Performance management in a bar fails in a predictable way. Somebody assembles a comprehensive set of metrics, everyone agrees they are important, and within two months nobody is looking at any of them.
The failure is structural rather than a lack of discipline. A measure with no interval, no owner and no decision attached is a fact, and facts accumulate until they are ignored.
The three intervals
Every measure belongs to exactly one of these. Putting a measure at the wrong interval is the most common mistake in this area.
Within the shift
What belongs here: anything with a live cause and a live fix. Section pace, a comp spike, running out of something, an unusual product mix on a busy night.
Who owns it: the manager on duty.
The test: if noticing it at nine would change what happens at ten, it belongs here. If not, it does not, and putting it here just adds noise to a busy service.
Within the week
What belongs here: comparisons between comparable shifts. Variance by product, comps by shift, spread between Fridays, whether last week's action happened.
Who owns it: the general manager, in about thirty minutes.
The test: can this be acted on before the same conditions come round again. Most genuine operational signal lives at this interval, and most venues have nothing running here at all. They have a live view and a monthly review, with a gap in between where the useful work would be.
Monthly or quarterly
What belongs here: the profit and loss, labour as a share of revenue, supplier pricing, par levels, staff turnover, anything structural.
Who owns it: the owner.
The test: would acting on this faster be meaningless because the underlying thing moves slowly. Renegotiating a supplier weekly is not diligence.
What to measure, by interval
Deliberately short. A longer list is not a better system.
Shift: revenue against comparable shifts, comps, section pace, stockouts.
Week: variance on the products carrying most volume, comp reasons clustered, spread between comparable shifts, last week's action.
Month: cost of goods by category, labour against demand shape rather than against revenue, waste, turnover, guest return frequency.
What to leave out, and why
Anything you will not act on. If no plausible reading of a number changes a decision, it is decoration. This removes more metrics than people expect.
Composite scores. A single number blending four things is not actionable, because a movement in it does not tell you which of the four moved.
Per person leaderboards. They produce optimisation of the measure rather than the work, and they make people manage the signal. Measure by product and by shift; where an individual is genuinely the cause it will be obvious without a ranking built to find it.
Anything measured only because it is easy. The reason cost dominates management attention is that it is countable, not that it has the most upside.
The part that makes it a system
One action per week, owned by a named role, checked the following week before anything new is looked at.
That single rule is what separates performance management from performance observation, and it is the rule most often skipped, because checking last week's action is less interesting than looking at this week's numbers.
The honest constraint
The weekly interval is the one that carries most of the value and it is also the one that requires assembly. Getting comparable shifts out of a point of sale is a genuine chore, every week, for somebody who is also running a bar.
That is why most venues end up with only a live view and a monthly review: those two are the ones you can get without doing any work. The middle interval, which is where the operational signal actually lives, is the one that needs either real discipline or a tool.
CoreTAP operates at that middle interval. The comparisons cover what else is available and what each product is genuinely good at.