Engr. Asim Saeed, Creative Problem Solver, TRIZ Consultant & Innovation Strategist
Mechanical systems often become complicated for a simple reason: every new problem creates a new component. A bracket is added to solve vibration. A cover is added for protection. A sensor is added for monitoring. Another mechanism is added to compensate for variation. Over time, the machine works but it becomes heavier, more expensive, harder to maintain and more difficult to manufacture. TRIZ offers a different question:
“What can we remove while keeping the required function?”
This is the idea behind Trimming.
What Trimming Really Means
Trimming is not simply deleting components. It means identifying the useful function performed by a component and asking whether that function can be performed by another component, an existing resource, or the surrounding system.
The objective is simple: remove the component without losing the required function.
A Practical Example: Machine Guarding
Consider an automated machine with a protective cover around a moving mechanism. The cover may require brackets, fasteners and a separate support structure. Instead of asking, “How can we make this cover cheaper?” a TRIZ engineer asks:
“What function does the cover perform?”
If it’s main function is to prevent contact with the moving mechanism, the surrounding machine frame may already be capable of providing that protection. The design team can investigate whether the frame or another existing structure can perform the same function.
Resource Analysis: Look Before You Add
Trimming becomes more powerful when combined with resource analysis. Every machine contains resources that engineers often overlook: unused space, existing surfaces, motion, heat, pressure, vibration, gravity, electrical signals, software and time.
Before adding a new component, ask:
“What resource already exists that could perform this function?”
For example, suppose a machine requires a separate mechanism to return a lightweight component to its starting position. Instead of automatically adding a spring, pneumatic cylinder or motor, examine existing resources. Could gravity provide the return force? Could the machine’s existing motion provide it? Could the product’s own movement create the required action?
A Modern Example: Cooling and Electronics
Consider an industrial control cabinet that requires additional cooling. The conventional response may be to install a larger fan or an additional cooling unit. Resource analysis changes the conversation.
Where is the heat being generated? Can heat-producing components be relocated? Can the cabinet structure act as a heat-transfer path? Can existing airflow be redirected?
The objective is not “add better cooling.” The objective is “achieve the cooling function with fewer additional resources.”
A Better Design Review Method
For mechanical designers, a practical trimming review can follow five questions:
1. What function does each component perform?
2. Is that function essential?
3. Can another existing component perform it?
4. Can an available resource perform it?
5. If the component disappears, what new problem must be solved?
This prevents simplification from becoming careless deletion and keeps the engineering function
at the center of the redesign.
The Business Benefit
Fewer components can mean lower material cost, fewer suppliers, shorter assembly time, fewer failure points, easier maintenance and a smaller machine footprint. It can also make spare-parts management and troubleshooting simpler.
A TRIZ redesign of a mechanical valve shows the power of trimming: a hydraulic pump, cylinder, Piping, oil system and related components were eliminated by transferring their functions to an Electromagnetic drive. The result reduced system elements by 33% and interactions by 43%, while eliminating several harmful effects.
The Leadership Takeaway
When engineers face a difficult machine problem, the instinct is often to add something. TRIZ encourages a more powerful question:
“Can we solve the problem by removing something?”
Trimming and resource analysis turn simplification into a systematic innovation strategy. It is to build a machine that performs more with less. Helping manufacturing industries solve costly technical problems systematically.
