The total cost of a cobot is the cost of a working application over the period you plan to use it: the robot package, the tooling and surrounding cell, the work of making everything operate together, application safety work, and the expenses of keeping it running. An arm-only price and a commissioned-cell price cannot be compared as if they buy the same result. Ask each seller for an included/excluded schedule tied to the same task, parts, site conditions, and acceptance test before comparing totals.
A manufacturer’s package list shows why the base configuration needs its own line: Universal Robots says a standard UR15 order includes the arm, control box, teach pendant, and cables, while application kits or other options are ordered separately. At the other end, an integrator’s palletizing-cell listing names a robot, gripper, stand, controls, and guarding as cell components. Neither example is a universal bill of materials. The useful question is which named components and services your quote commits to deliver.
Make the two proposals describe the same cell
Give bidders one short application brief: the part and its variation, the pick or process points, required handoff to other equipment, operating hours, available floor space, utilities, and who supplies sample parts. Ask them to state the assumptions they used. A machine-tending quote for one part and a quote allowing several part variants may need different fingers, fixtures, programs, and acceptance runs. A lower price with narrower assumptions may simply defer work to the buyer.
Copy this table into the request for quotation. For every row, ask for a named item or deliverable, quantity, one-time price, any recurring charge, the party responsible, and an explicit included, buyer-supplied, optional, or excluded mark. A blank cell is a question, not a zero-cost item.
| Scope to reconcile | What the quote should name | Typical gap to resolve |
|---|---|---|
| Robot package | Exact arm model, controller or control box, pendant or enabling device, cables, software version, mounting hardware, warranty | “Robot included” leaves package configuration and options unclear. |
| End-of-arm tooling | Gripper or process tool, fingers or cups, adapter, tool changer, sensors, air or vacuum supply, replacement wear items | A gripper may be priced while custom jaws and plant air work are omitted. |
| Vision and sensing | Camera, lens, lighting, mounting, calibration target, inspection or localization software, re-calibration work | A camera demonstration may assume fixed presentation and lighting the site cannot provide. |
| Physical cell | Base or pedestal, fixtures, part trays, conveyor changes, cable routing, electrical work, shipping, rigging, installation | A bench demonstration does not include production mounting and site preparation. |
| Controls and integration | Robot program, recipe or part variants, PLC/CNC interface, signals, network work, error recovery, documentation | “Integration” may cover only a basic start/stop exchange. |
| Application safety | Task risk assessment, selected safeguards, safety circuit integration, validation evidence, operator instructions | A cobot label does not define the safe configuration of the finished application. |
| Commissioning and acceptance | Site test conditions, sample parts, target output and quality measures, permitted interventions, defect correction, handover | A factory demonstration can pass while the installed process remains unproven. |
| Training and support | Operator and maintenance training, manuals, spare parts, warranty response, service plan, software or vision licenses | First-year support may be included while later coverage is not. |
The categories are grounded in supplier descriptions of end effectors, integration, line changes, and programming and in Universal Robots’ deployment cost discussion. They are a buyer’s comparison framework, not a claim that every application requires every listed item.
Price the work that happens before handover
Separate the vendor’s equipment subtotal from installed and accepted scope. For example, consider a hypothetical machine-tending cell with one robot, one gripper, two jaw sets for two part variants, one mounting stand, one machine interface, and one site acceptance run per variant. This is a quantity-and-scope illustration, not a vendor quote or typical configuration. If Proposal A lists only the robot and gripper while Proposal B includes both jaw sets, the stand, interface, and two runs, their headline totals answer different questions. Request an addendum from A for the missing scope and an itemized exclusion list from B before comparing them.
Draw the site boundary precisely. Who supplies compressed air, electrical service, network access, machine signals, sample parts, guarding space, and downtime for installation? Who changes the existing PLC or CNC program? If the buyer’s staff will do a task, record the hours and required skill in the internal budget even when the supplier charges nothing for it. If the task is unresolved, record it as an open estimate instead of treating it as free.
Safety belongs in that same scope discussion. Include the task, end effector, workpiece and surrounding equipment in the safety scope. Universal Robots’ deployment-cost discussion includes safety-related retrofitting among the costs to investigate; it does not set a safeguarding budget for your cell. Ask who will perform and document the assessment, who will supply any resulting guards or sensors, and what evidence will be handed over. The assessment can change the design and price. This quote checklist cannot decide which measures are sufficient for a specific site; the separate collaborative robot safety modes guide explains that technical question.
Define acceptance before comparing totals
An installed cost is meaningful only if both suppliers promise the same handover result. Put the acceptance method in the statement of work: which part variants and input conditions will be tested, how output and defects will be counted, who logs stops and manual interventions, how long each run lasts, and what happens after a failed test. Specify whether the price includes retesting after supplier fixes, travel for repeat visits, and delivery of programs, drawings, backup files, and operating instructions. If a supplier excludes a required acceptance condition, show that exclusion beside its price rather than burying it in a footnote.
Avoid a single undefined “cycle time” promise. A short dry run with perfectly presented parts does not establish what the cell will do with normal variation, replenishment, fault recovery, and the actual upstream machine. The test should represent the application being purchased. This is a contract scope recommendation, not a prediction of throughput.
Keep running costs on a separate line
Create a one-time column for equipment, engineering, installation, commissioning, and initial training. Create a recurring column for software or vision licenses, service coverage, inspections, maintenance, consumable tooling, spare parts, energy, and any paid support calls. Add a planning line for production time lost to planned maintenance and unexpected stops; do not invent a downtime rate when there is no plant history. Record warranty term, response time, geographic coverage, exclusions, and the date prices can change. Universal Robots describes its UR Care plans as annual service offerings with defined support and parts features, while also describing what comes with the robot; actual coverage still depends on the purchased plan and contract.
Compare the same time horizon and currency, with tax, freight, and installation treatment made explicit. Then keep the accepted installed cost and expected operating expense visible as separate subtotals. If you later evaluate financing or a service model, the RaaS overview and purchase-versus-RaaS break-even guide address that next decision. They cannot repair an incomplete cell quote.
The next action is simple: return each proposal with the same completed scope table and acceptance schedule. Only compare the prices after the missing rows have a supplier commitment, an owner on your side, or a separately budgeted estimate.