Test the performance and condition of installed mechanical components and assemblies

Business Sectors (Suites): Installing Plant and Systems - Mechanical
Developed by: ECITB
Approved on: 10 Dec 2020


This standard is about testing the performance and condition of installed mechanical components and assemblies in engineering construction.
You will need to be able to test the performance and condition of installed mechanical components and assemblies whilst adhering to health, safety and environmental legislation, regulations and safe working practices
In the context of this standard, your responsibility is to interpret and work within given specifications, selecting techniques and making variations to achieve the best possible result.  In some cases, you may still be expected to refer to others for final authorisation, even though you remain responsible for identifying and implementing decisions. 
**Who this standard is for**
This standard is for mechanical fitters.

Performance criteria

You must be able to:

  1. work safely at all times, complying with health, safety, environmental and other relevant legislation, regulations, guidelines and local rules or procedures
  2. ensure that the work environment, materials, tools and equipment are suitably prepared for the work activities to be undertaken
  3. follow the appropriate procedures and schedule for testing and inspection
  4. establish the required performance criteria for the installed components or assemblies being tested
  5. check the testing equipment is calibrated correctly and then set it up, taking the environmental conditions into account
  6. carry out the test or inspection, using the correct procedures, taking care to exclude all foreign material
  7. recognise anomalies during testing and take appropriate action
  8. record the results of the test in a clear and accurate manner
  9. review the results - identifying any faults and variations and ensure all necessary testing data has been captured
  10. reinstate the work area
  11. deal promptly and effectively with problems within your control and report those that have and those that cannot be solved

Knowledge and Understanding

You need to know and understand:

  1. relevant legislative, regulatory and local requirements or procedures and safe working practices including your responsibilities with regards to reporting lines and procedures
  2. preparation and reinstatement requirements in respect of the work area, material, tools, and equipment and the possible consequences of incorrect actions in these areas 
  3. relevant engineering test and inspection specifications and related plans and schedules
  4. the selection and use of the correct method and procedure for inspecting and testing the performance and condition of installed mechanical components and assemblies
  5. what types of anomalies may occur during testing, how to identify them and what action to take
  6. how to set up, check and check the calibration of the equipment being used for testing
  7. the impact different environmental conditions can have on a test
  8. how to record the test results and any issues identified and the documentation for this
  9. tool and equipment control:  the correct use of relevant tools and equipment and your individual responsibility for the use, care and security of those you use


Work environment

**Typical work environments could include:

  • engineering construction sites
  • controlled operations
  • offshore installations
  • maintenance sites
  • nuclear sites
  • repair sites

Work environments may be open or restricted spaces: 

  • at height
  • confined spaces
  • control rooms
  • controlled operational and offshore installations
  • designated work areas
  • explosive atmospheres
  • existing plants and structures
  • fabrication workshops

  • in plant rooms

  • inside structures, system and plant
  • on access structures (scaffold)
  • on open structures

  • onshore and offshore installations

  • shafts

  • shipyards
  • tunnels

     Reinstate the work area

This term could include:

  • returning the work area to a safe condition
  • removing barriers
  • sweeping up
  • correctly disposing of waste materials
  • storing re-usable materials, consumables and equipment in accordance with appropriate procedures
  • completing all necessary documentation

Scope Performance

Scope Knowledge





Links To Other NOS

External Links

Version Number


Indicative Review Date

10 Dec 2024





Originating Organisation


Original URN


Relevant Occupations

Mechanical Fitter

SOC Code



Results; calibration; vibration; readings; flow rates; pressure intervals; environmental controls; inspection; quality; standards; test; mechanical plant, systems and equipment; mechanical testing; engineering construction