Two quotations for the same wash-down job on industrial equipment can look identical and still need very different numbers of people on the floor. One supplier may describe a machine that a single operator runs start to finish; another may describe the same duty with someone standing by the whole shift. Neither proposal usually states how many hands are required, so the buying team has nothing to compare. If your team is weighing PowerDe cleaning equipment against another offer, the labour question has to be settled before price is discussed. A clean comparison comes from three things: a written task chain, an agreement on what counts as one unit of work, and a short recorded trial run on your own industrial equipment surfaces.
Compare labour needs against an identical unit of work
A labour figure means nothing until the unit it refers to is fixed. "One shift" could mean a morning of surface washing on one line, or the same crew moving across several bays. Fix the unit in writing before comparing: which equipment, which surfaces on it, what the deposit looks like before work starts, what "clean" means when the crew finishes, and whether drying, inspection and refitting guards count inside the shift. With that definition shared, two proposals can be placed side by side. Without it, you are comparing a crew count to a marketing sentence.
Ask each supplier to state their labour needs against the same written unit. A supplier who cannot do that is not quoting labour; they are quoting a machine and hoping the site works out the rest.
Break the task chain before counting hands
Labour needs are an output, not an input. Break the job into steps and count hands per step. For a typical surface wash on industrial equipment, the chain usually runs: isolate the machine and confirm it cannot start; move covers, guards or nearby parts out of the way; protect bearings, electrical enclosures, wiring runs, sensors and intake openings; pre-remove loose debris; heat the surface and hold it; work the deposit; collect what runs off; dry the surfaces; refit what was removed; inspect; write the record. Each line either needs one person, two people, or nobody.
Two people appear where a part is awkward to hold while being cleaned, where a shielding sheet needs someone to keep it in place, and where a second person watches a hose or lead. If nobody on either proposal can name which steps carry the second pair of hands, the labour figures are guesses.
Separate machine attention from machine operation
This is where most labour comparisons go wrong. Some equipment runs while an operator works directly with it. Other equipment needs someone near it the whole time for refilling, monitoring or safety reasons, even when that person is not touching the lance. Ask each supplier, for each step in your task chain, whether an operator must stay at the unit, may walk away, or must return at a defined point. The answers change the crew size far more than any performance claim on the sheet.
For a commercial steam cleaner installed at a fixed point, ask in writing whether the arrangement allows one operator to cover the work alone, whether someone must be assigned to the unit for refilling or supervision, and how far the delivery reaches before the crew has to walk back. The published description alone does not tell your team how many people the equipment will require on industrial surfaces.
Judge how much walking and handling the layout causes
Labour is spent on movement as much as on cleaning. Where the unit parks, how far the hose reaches, whether it can be pulled to the machine or the machine must be moved to it, whether water is refilled at the point of work or walked to, and whether power is available where the crew works all change the number of people needed. A unit placed far from the line turns short cleaning passes into long return trips, and crews compensate by adding someone.
Walk your own equipment with the supplier standing beside you. Point out each surface, say how the crew reaches it, and ask them to describe the route from the unit to that surface and back. Do the same walk with every bidder, on the same equipment, in the same order. That single visit exposes labour differences that no written proposal shows.
Run one short recorded trial on your own surfaces
Suppliers do not publish a labour rate for washing industrial equipment surfaces, so a fair baseline has to be produced on site. Choose one machine that stands for the wider group, agree the written unit of work, and run the job once with your own crew using the equipment on trial. Record who was present, what each person did, how long each step of the task chain took, and what had to be repeated.
Keep the trial bounded: one machine, one shift, one defined end point, and a stop condition agreed beforehand, for example when a surface shows damage or when water reaches an area that must stay dry. Have the results judged by someone who did not hold the equipment. One recorded run on your floor gives your team a labour figure you can trust, which beats any estimate quoted from a catalogue.
Read the specification sheet as a staffing document
Most specification rows carry labour consequences, but only when they are read for staffing rather than performance. The tank and refill rows tell you how often someone must interrupt the work. The duty-cycle rows tell you whether the unit can be worked continuously or must be rested, which decides whether a crew waits or works elsewhere. The safety rows, such as cut-offs and pressure relief, tell you what a supervisor must confirm before and after each use. The mobility rows tell you how the unit gets to the machine and who moves it.
When a row is missing or unclear, ask for it in writing for the exact unit being quoted, and send the same list of questions to every bidder. Where a duty in your scope is not described on the published page, treat it as unproven until a trial on your own surfaces shows otherwise.
Put skill and training inside the labour comparison
The same machine can take one trained operator or two general labourers, depending on how much judgement the work demands. Ask what the crew must know before use: which surfaces may be worked and which must be avoided, how long heat is held before a deposit releases, how shielding is placed, what to do when a surface does not respond, and how the finished work is signed off. If the answer is a long list, budget for induction time and for refresher cover, and confirm who provides that training and for how long.
Where your surfaces fall outside what a page describes, discuss customized steam cleaning equipment rather than assuming the standard arrangement fits. A configuration built around your reach, water access and duty pattern usually shifts the labour figure more than any adjustment made on the day.
Compare a whole shift, not one cleaning pass
A single cleaning pass flatters every option. Compare a full shift instead, including the tasks that surround the wash: the isolation and permit routine, moving and refitting parts, waiting for a unit to be ready, refilling, handling waste water, drying, inspection, and the written record your audit requires. Those supporting tasks often need more people than the cleaning itself, and they are where one arrangement pulls ahead of another for the same surfaces.
Put the labour comparison in writing for every bidder
Send each supplier the same sheet: the written unit of work, the task chain with a column for hands required at each step, the walking and handling limits found on your site walk, the trial record from your own machine, and the specification rows you need confirmed for the exact unit quoted. Ask each bidder to fill in their labour needs in the same format and to state which items they have measured and which they are estimating.
When the sheets come back, compare the rows against your trial record rather than against each supplier's summary. The offer whose stated hands match what your team watched on your own floor is the one worth taking further, and the ones that do not are the ones to question before any order is placed.
