Cobots in manufacturing: economics before automation
How collaborative robots change the calculation for small and mid-sized manufacturers, and why the return-on-investment question matters more than the technology question.
Industrial automation has long been the territory of large companies. A traditional industrial robot means significant capital spending, specialised integration, safety guarding, retooling for each task. For a mid-sized plant with varied small-batch production, it rarely made economic sense.
Over the past few years that has started to change. Collaborative robots - cobots - have become more accessible both in price and in deployment threshold. They are designed to work alongside people, can be reprogrammed relatively quickly, and do not require complex guarding. For small and mid-sized manufacturers this is a different conversation.
But before moving to the technology, the economics need to be worked out.
What has changed recently
Several manufacturers - Universal Robots, KUKA, Rethink Robotics, and others - have brought to market solutions that differ from traditional industrial robots on several dimensions.
The entry cost has come down. Prices for some cobot models have dropped to a range where payback within a few years is realistic even for relatively small operations.
Reprogramming has become simpler. Redirecting a traditional robot to a new task required a specialised integrator. Some cobots can be reprogrammed by physically guiding the arm through a motion and recording the path. This changes the economics of frequent changeover.
Safety requirements are simpler. Cobots include force sensors and stop on contact with a person. This does not eliminate all workplace safety requirements, but it simplifies integration into existing spaces.
Where this makes economic sense
Not everywhere. Cobots are well suited to tasks with certain characteristics:
Repetitive operations with predictable objects - assembly, packaging, testing by a standard procedure. The more stable the task, the easier it is to automate.
Operations where consistent precision matters - adhesive application, template welding, control measurements. People get tired; robots do not.
Work in conditions uncomfortable for people - high temperature, monotonous load on the same muscle groups, contact with hazardous materials.
At the same time, cobots are a poor fit for tasks with high object variability, for handling parts that are difficult to grip with standard tooling, and for operations requiring fine adaptation to each situation.
How to calculate the economics
A simple approach: compare the cost of automation (equipment, integration, maintenance, changeover) with the cost of doing the same operation manually over the same period.
Typical errors in this calculation:
Underestimating integration costs. The cobot itself is only part of the cost. Tooling, programming, workspace adaptation, operator training - these are often comparable amounts.
Ignoring changeover cost. If production is diverse and changeovers are frequent, their cost must be included in the economic model.
Optimistic utilisation assumptions. Real equipment utilisation rarely matches the theoretical. Building 90% utilisation into the model is a path to disappointment.
Questions for assessing a pilot
Before launching a cobot pilot, a few questions help check readiness:
- What specific operation are we automating, and how repetitive is it?
- Who will be responsible for the system in daily operations?
- What happens if the cobot goes down - how critical is this operation?
- How will we measure pilot success - by what metrics?
- Do we have a realistic calculation of total deployment cost, including integration and changeover?
The technology itself is mature enough for first applications. The key question is whether you have a specific task with a clear economic case.