A request for quotation that reads "develop a machine to do this job" comes back with a price and no scope, because the supplier had to invent half of it themselves. An accelerated programme makes that worse rather than better: when design, prototyping and test work run in parallel instead of in sequence, the brief is the only document keeping three teams pointed at the same target. The fields below are what a brief has to contain before a supplier can be held to a quotation, and the order follows how a project actually fails - an unclear job, an unstated constraint, an acceptance test nobody can measure, then an argument at handover.
What the brief is for when work runs in parallel
In a conventional programme a misunderstanding is caught at the next gate, weeks later. In an accelerated one, the drawing office, the prototype bench and the test rig are all moving at once, so a wrong assumption is built three times before anyone notices. Shenzhen PowerDe Automation Precision Equipment describes its engineering work as covering product R&D acceleration, product development, hardware testing, manufacturing automation and integrated engineering teams, which is a set of functions that have to be handed the same document rather than three interpretations of one email.
Write the brief for three readers, and check each section against all three. The person signing the purchase order needs a scope they can compare with another quotation. The engineers doing the work need to know what may not change. The people who will operate and maintain the delivered asset need to know what they are being trained on. A brief that satisfies only the engineers produces a machine nobody is willing to buy; one that satisfies only the buyer produces a machine nobody can run.
State the job, the environment and the failure that ends the project
Start with the job in physical terms rather than the intended machine. What has to happen to the part, the surface or the process, in what environment, by whom, and how often. A cleaning, bonding, coating or handling duty behaves differently in an indoor garage with a narrow aisle than in a plant bay with a floor drain, and differently again where neighbouring equipment is still running.
Then state the failure condition: what outcome means the project is cancelled. It is usually something mundane - a process that leaves residue in a recess, a machine that cannot pass a doorway, a cycle that cannot be sustained by one operator, a consumable your site cannot source. Naming it in the brief is what lets a supplier propose around it instead of discovering it in the last phase.
Say what you will do with the answer after delivery: build a product line, replace a manual process, retrofit an existing line, or qualify a supplier. That single sentence changes what a sensible contractor puts in the schedule, because a qualification decision needs comparable evidence while an internal process change needs trained operators.
Put your constraints in writing before anyone quotes
Constraints are where most of the cost hides, and most buyers leave them to a site visit that happens after the price. Put them in the document:
- envelope and handling: the largest footprint and weight that will pass your doors, aisles and any level change, and how the asset is moved and positioned;
- utilities actually available: supply voltage, available power, a water source and its fitting, drainage, compressed air, and the length of run from each point to where the machine must stand;
- what must not change: the interface to an existing line, the consumables your site stocks, the skill level of the operators who will run it, the shift pattern it must survive;
- what is forbidden or sensitive: open water near electrical enclosures, work near breathers or seals, mist and vapour in a closed bay, treating live or still-hot surfaces.
The reason these belong in the brief and not in a later email is that a supplier who learns a constraint after quoting does not reduce their price - they raise yours at handover, usually as an accessory, an adapter or an "additional works" line.
Define acceptance as measured fields, not adjectives
Words such as clean, precise, efficient or reliable cannot be tested and will not survive a handover argument. Replace each one with a field, a method of reading it, and a pass rule. The set that carries most of the weight in equipment work:
- the asset or surface class and the soil or defect class being treated, described before the trial and photographed;
- number of passes, nozzle or tool used, the setting as displayed on the machine, and time per unit of area or per asset;
- dwell and rinse or drying time, and the labour minutes per asset including preparation and recovery;
- which readings come from the machine's own display or plate and which you measure yourself, so that a claim and an observation are never confused;
- a control sample kept untouched through the trial, which is the difference between an impression and a comparison.
Fix the acceptance fields before the work starts, not after the first result arrives. A criterion written after a supplier has produced one good demonstration has already been negotiated.
Separate published facts from the fields you still have to measure
A good brief marks which numbers are already on paper and which are assumptions, and a supplier who is doing this honestly will do the same in their scope. Two published examples from the cleaning range show how narrow the published set is.
The Fixed Steam Cleaning Machine PowerDe HW02 page states 220 V working voltage, 6 kW heating power, a steam temperature of 160 degrees, a vapour pressure of 0.8 MPa, an 80 L SUS304 tank, overall dimensions of 1,200 x 800 x 1,200 mm including handles, a tap-water inlet using a 4-point internal-tooth joint in the 1/2 inch size, dry and wet steam modes and a vacuum function. Each of those is a site constraint you can check against your own bay before the unit arrives.
The hand-pushed HMW3 page states a 4.5 kW PTC semiconductor heater, a 50 L clean-water tank, dry and wet steam modes, a working supply of 48 V from a battery, machine dimensions of L1150 x W520 x H1030 mm, and a high-pressure water gun with nozzle.
Neither page publishes hose, wand or cable reach, weight, noise, water consumption per hour, duty cycle at full output, drying time, or - for the battery-powered unit - capacity and runtime. So those fields belong in the brief as things your trial must measure or your supplier must state in writing, not as assumptions inside a scope. Asking for them is also the fastest test of a supplier: a hardware testing answer that names each missing field per model is quoting your project, while one that repeats the catalogue is quoting their brochure. Note too that the HW02 page names vehicle exterior cleaning, interior work and engine-compartment cleaning, and the HMW3 pages name hospital beds and medical machinery; if your duty is a different one, application suitability is an open question to close, not a claim to accept.
List the risks and the tests that retire them
Write the risk register as pairs: the risk, and the test or evidence that closes it. The protection behaviour a machine's own page names is a useful starting set for anything that combines heat, water and an electrical supply on a plant floor - leakage, short-circuit, high-temperature, high-voltage and water-shortage protection are listed on the cleaning pages, along with high-voltage-explosion protection on some models, without a stated count. Each of those raises a practical question for your site rather than a marketing one: what does the machine do when the protection triggers mid-shift, who resets it, and what happens to a half-treated asset.
Then add your own: the electrical run you were given and its protection device, whether the water inlet and drainage are where the machine has to stand, how the asset is handled by the people who will use it every day, the duty cycle it will actually be held to, and consumables and spares your site can source. Assign each risk to a phase. In an accelerated programme a risk retired early is cheap; the same risk met at commissioning is a schedule and a change order.
Name the deliverables and the handover
Specify what you receive, in what form, and against what acceptance evidence. A short list that leaves little room for argument: drawings and parameter sheets for the delivered build; a working prototype or production unit; a test report recorded against the acceptance fields you defined, not the supplier's; the tooling and fixture list; the spares and consumables list with the source of each; and the operating and maintenance documentation your own staff will be trained from. If your people will run the asset, a training session with a written record belongs in the deliverables too.
State who owns the design files and the test data, and in what format you want them. That conversation costs nothing in the brief and is expensive after the prototype exists.
What to send, and what to ask the supplier to return
Attach evidence rather than description: before-and-after photographs of the real job taken from a fixed position, an asset and surface list, the site utility description, and any existing record of the process you are trying to replace. For equipment or process work that no catalogue line covers, that is the input a survey and customized equipment request needs; a written enquiry carrying your constraints and acceptance fields gets a scope back, while one carrying only a desired outcome gets a price back.
Ask every supplier to return the same four things so that their answers can be compared: the scope in their own words with the acceptance fields restated; a schedule with named review points and the phase at which each risk is retired; the assumptions they made where your brief was silent; and the price band per phase with what each phase delivers. Send the same questions to the product R&D accelerator and to two other suppliers - a brief that produces comparable answers from three suppliers is a brief that works, and the one difference between the answers is usually the thing you had not thought to write down.
Boundary of this article: the only equipment figures stated here are those published on the manufacturer's own product pages - the HW02 fixed unit (220 V, 6 kW, 160 degrees, 0.8 MPa, an 80 L SUS304 tank, 1,200 x 800 x 1,200 mm including handles, a 4-point internal-tooth water inlet in the 1/2 inch size) and the HMW3 hand-pushed unit (4.5 kW PTC heater, 50 L clean-water tank, 48 V battery supply, L1150 x W520 x H1030 mm). Reach, weight, noise, water use per hour, duty cycle, drying time, battery capacity and runtime are not published for either machine and none is stated here. No project count, patent count or staffing figure is used, because the site publishes inconsistent versions of those. The brief-writing structure above is general procurement guidance for engineering work; the cleaning machines named are examples of how thin a published specification is, not a statement that either model suits your process.
