Collaborative robots: the economics of a cobot for managers
Cobots are not new, but in 2016 their cost and ease of deployment have reached the point where the economics conversation has become practical.
A classic industrial robot is a large, expensive, fenced-off machine. It is fast and precise, but requires significant integration, reconfiguration takes hours or days, and a human cannot be nearby without stopping the cycle. The entry threshold is high - both in cost and in organisational effort.
Collaborative robots, or cobots, emerged as a different class. They are slower and carry less load, but can work alongside a human without a safety fence, reconfigure quickly, and the entry threshold is significantly lower. The cobot market has been growing for several years, but now prices and functionality have reached the point where this is a conversation not about a pilot but about real deployment.
Where cobots work and where they do not
A cobot is not a universal tool. Its strengths show up in specific conditions.
Suitable scenarios: monotonous tasks with a repeatable cycle alongside a human workstation - part feeding, assembly, testing, packaging. Tasks where consistency matters more than speed. Environments where the product mix changes and quick reconfiguration is needed.
Unsuitable scenarios: high speed and payload - a classic industrial robot is better here. An unstructured environment where objects appear unpredictably - a cobot cannot manage without additional technical solutions. Tasks requiring precision beyond the specification of the specific model.
How to calculate the economics
The price of a cobot today is from several tens to one or two hundred thousand dollars depending on manufacturer and configuration. That is significantly cheaper than a classic industrial solution.
But the full cost is not just the hardware. To it you add: process integration (engineering, fixtures, grippers), programming and setup, operator training, support and maintenance.
The right question for payback assessment: at which workstation does a person currently perform a monotonous repetitive cycle, and how much does that workstation cost per year? If you can get the answer, the rest of the calculation is straightforward.
A separate question - not replacement but redeployment. Many successful cobot deployments do not remove people from the line but redistribute them: the cobot takes the monotonous task, the person handles control, reconfiguration, and complex cases. This changes the ROI calculation.
What is often underestimated
First - integration time. The cobot itself is ready quickly. Designing the gripper for a specific part, aligning it with the process, training the staff - this takes longer than initial estimates suggest.
Second - process change. For a cobot to work consistently, the incoming flow of parts needs to be predictable and standardised. If parts arrive with variability, the cobot will make errors. Sometimes cobot deployment requires organising the process itself first.
Third - operational support. Who in the company knows how to reprogram the cobot when the task changes? That is either an in-house specialist or a dependency on the vendor.
Questions for initial assessment
- Do we have a specific workstation or operation with a monotonous cycle where consistency matters more than speed?
- How standardised are the parts and conditions at that workstation?
- Who will be responsible for the cobot as equipment - maintenance, reconfiguration, programme updates?
- How will the workload of people at this station change - and is that organisationally acceptable?
If there are answers to these questions, a pilot at one workstation will give clear understanding of the real economics. Without a pilot, the numbers stay theoretical.