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Force

Use the grid below to determine the level of force exerted with the hand and the amount of time that the force is exerted. It is possible to select intermediate scores on the grid if appropriate. If more than one type of force is exerted, select the highest score obtained with the grid.

There are two methods to determine the level of hand force:

  • Where possible, ask the person doing the work if there are any actions that require muscle effort of the arm, hand or fingers. If such actions are identified, ask the worker to describe the level of force involved in each action (eg light force, moderate force, strong force, or very strong force).
  • Otherwise, use the written descriptions below to determine the level of force exerted with the hand.
Light force There is no indication of any particular effort
Moderate force

Force needs to be exerted. For example:

  • Pinching or gripping objects with some effort
  • Moving levers or pushing buttons with some effort
  • Manipulating lids or components with some effort
  • Pushing or forcing items together with some effort
  • Using tools with some effort
Strong force Force is obviously high, strong or heavy
Very strong force Force is near to the maximum level that the worker can apply

Remember that it is important to consider the time when the force assessment is made. Workers may describe the level of force to be greater at the end of the day or after they have done the task for several hours.

Assess both the left (L) and right (R) arm.

You will need to use the grid to assess:

  • The level of force exerted with the hand, and;
  • The amount of time that the force is exerted

Note: Hover over table for more detail, (over A2 and between A2 and R9).

Force assessment colour grid A2 Example R6 Example

*Changes to the task are required due to unacceptable levels of force.

For example, a moderate force exerted with the right hand for part of the cycle time produces a score of Amber 2.

It is possible to select intermediate scores if appropriate.

For example, a moderate to strong force exerted for a part of the cycle time could be scored between Amber 2 and Red 9. In this case, a score of Red 5 or Red 6 might be appropriate.

If more than one type of force is exerted, select the highest score. For example, if a task involves both a light force exertion for a part of the time and a moderate force exertion for a part of the time, select the highest score.

In some circumstances, it may not be practical to speak to workers about the level of force involved in the task. In this case, some descriptions are provided to help estimate the level of force applied with one hand. However, determining a hand force level based solely on observation is discouraged as this is vulnerable to errors in judgment.

Sometimes it can be difficult to determine whether the level of hand force is light, moderate, strong or very strong. Some other tools and techniques are available to help make a more accurate assessment of the level of force. These are described further in the FAQs, which you might like to read once you are familiar with how to use ART and have practiced a couple of assessments.

Link URLs in this page

  1. MSDshttps://www.hse.gov.uk/MSd/msds.htm
  2. Back painhttps://www.hse.gov.uk/MSd/backpain/index.htm
  3. Upper limb disordershttps://www.hse.gov.uk/MSd/uld/index.htm
  4. Lower limb disorders https://www.hse.gov.uk/MSd/lld/index.htm
  5. Display screen equipment (DSE)https://www.hse.gov.uk/MSd/dse/index.htm
  6. Manual handling at workhttps://www.hse.gov.uk/MSd/manual-handling/index.htm
  7. Overview - MSD toolkithttps://www.hse.gov.uk/MSd/toolkit.htm
  8. Overview - MAC toolhttps://www.hse.gov.uk/MSd/mac/index.htm
  9. Introduction to MAChttps://www.hse.gov.uk/MSd/mac/introduction.htm
  10. Developmenthttps://www.hse.gov.uk/MSd/mac/development.htm
  11. Score sheethttps://www.hse.gov.uk/MSd/mac/scoresheet.htm
  12. Overview - Liftinghttps://www.hse.gov.uk/MSd/mac/liftintro.htm
  13. Lifting from pallet videohttps://www.hse.gov.uk/MSd/mac/liftvid1.htm
  14. Lifting creels of wire videohttps://www.hse.gov.uk/MSd/mac/liftvid2.htm
  15. Lifting control measureshttps://www.hse.gov.uk/MSd/mac/guidance01a.htm
  16. Overview - Carryinghttps://www.hse.gov.uk/MSd/mac/carryintro.htm
  17. Carrying from conveyor videohttps://www.hse.gov.uk/MSd/mac/carryvid1.htm
  18. Carrying task in pastry factory videohttps://www.hse.gov.uk/MSd/mac/carryvid2.htm
  19. Carrying control measureshttps://www.hse.gov.uk/MSd/mac/guidance02a.htm
  20. Overview - Team handlinghttps://www.hse.gov.uk/MSd/mac/teamintro.htm
  21. Team handling pallet videohttps://www.hse.gov.uk/MSd/mac/teamvid1.htm
  22. Team handling container videohttps://www.hse.gov.uk/MSd/mac/teamvid2.htm
  23. Team handling control measureshttps://www.hse.gov.uk/MSd/mac/guidance03a.htm
  24. Psychosocial risk factorshttps://www.hse.gov.uk/MSd/mac/psychosocial.htm
  25. Individual differenceshttps://www.hse.gov.uk/MSd/mac/individuals.htm
  26. MAC assessment tipshttps://www.hse.gov.uk/MSd/mac/tips.htm
  27. MAC FAQhttps://www.hse.gov.uk/MSd/mac/faq.htm
  28. Overview - V-MAChttps://www.hse.gov.uk/MSd/mac/vmac/index.htm
  29. Advantages and limitationshttps://www.hse.gov.uk/MSd/mac/vmac/1-advantages-limitations.htm
  30. What you need to knowhttps://www.hse.gov.uk/MSd/mac/vmac/2-what-you-need-to-know-before.htm
  31. How to use the V-MAChttps://www.hse.gov.uk/MSd/mac/vmac/3-how-to-use.htm
  32. Which jobs and workers to assesshttps://www.hse.gov.uk/MSd/mac/vmac/4-which-jobs-workers-to-assess.htm
  33. Entering datahttps://www.hse.gov.uk/MSd/mac/vmac/5-entering-data.htm
  34. What does the V-MAC tell you?https://www.hse.gov.uk/MSd/mac/vmac/6-what-does-vmac-tell-you.htm
  35. Values in the summary tablehttps://www.hse.gov.uk/MSd/mac/vmac/7-summary-tables.htm
  36. Recording and usinghttps://www.hse.gov.uk/MSd/mac/vmac/8-recording-and-using.htm
  37. Worked exampleshttps://www.hse.gov.uk/MSd/mac/vmac/9-worked-examples.htm
  38. V-MAC FAQshttps://www.hse.gov.uk/MSd/mac/vmac/10-faqs.htm
  39. Overview - ART toolhttps://www.hse.gov.uk/MSd/uld/art/index.htm
  40. What is the ART toolhttps://www.hse.gov.uk/MSd/uld/art/whatis.htm
  41. Overview - Learning to use the ART toolhttps://www.hse.gov.uk/MSd/uld/art/learning.htm
  42. Preparationhttps://www.hse.gov.uk/MSd/uld/art/preparation.htm
  43. Risk factorshttps://www.hse.gov.uk/MSd/uld/art/riskfactors.htm
  44. Observationhttps://www.hse.gov.uk/MSd/uld/art/observation.htm
  45. Overview - Making an assessmenthttps://www.hse.gov.uk/MSd/uld/art/assessment.htm
  46. Task descriptionshttps://www.hse.gov.uk/MSd/uld/art/task.htm
  47. Overview - Assessment guidehttps://www.hse.gov.uk/MSd/uld/art/assessguide.htm
  48. A. Frequency and repetition of movementshttps://www.hse.gov.uk/MSd/uld/art/freqrep.htm
  49. B. Forcehttps://www.hse.gov.uk/MSd/uld/art/forceassessment.htm
  50. C. Awkward postureshttps://www.hse.gov.uk/MSd/uld/art/awkpostures.htm
  51. D. Additional factorshttps://www.hse.gov.uk/MSd/uld/art/addfactors.htm
  52. Score sheethttps://www.hse.gov.uk/MSd/uld/art/score.htm
  53. A walkthroughhttps://www.hse.gov.uk/MSd/uld/art/walkthrough.htm
  54. Overview - Try it outhttps://www.hse.gov.uk/MSd/uld/art/try.htm
  55. Book bindinghttps://www.hse.gov.uk/MSd/uld/art/bookbinding.htm
  56. Jogging sheetshttps://www.hse.gov.uk/MSd/uld/art/jogging.htm
  57. Collating papershttps://www.hse.gov.uk/MSd/uld/art/papers.htm
  58. Whisky carton assemblyhttps://www.hse.gov.uk/MSd/uld/art/cartonassembly.htm
  59. Croissant curlinghttps://www.hse.gov.uk/MSd/uld/art/croissant.htm
  60. Overview - Analysis and actionshttps://www.hse.gov.uk/MSd/uld/art/analysis.htm
  61. What the scores meanhttps://www.hse.gov.uk/MSd/uld/art/scoresmean.htm
  62. Analysing task rotationhttps://www.hse.gov.uk/MSd/uld/art/rotation.htm
  63. Overview - Taking actionhttps://www.hse.gov.uk/MSd/uld/art/action.htm
  64. Repetitionhttps://www.hse.gov.uk/MSd/uld/art/repetition.htm
  65. Forcehttps://www.hse.gov.uk/MSd/uld/art/force.htm
  66. Posturehttps://www.hse.gov.uk/MSd/uld/art/posture.htm
  67. Durationhttps://www.hse.gov.uk/MSd/uld/art/duration.htm
  68. Physical environmenthttps://www.hse.gov.uk/MSd/uld/art/environment.htm
  69. Psychosocial issueshttps://www.hse.gov.uk/MSd/uld/art/psychosocial.htm
  70. Art Tool Resourceshttps://www.hse.gov.uk/MSd/uld/art/resources.htm
  71. Frequently asked questionshttps://www.hse.gov.uk/MSd/uld/art/faq.htm
  72. Overview - RAPP toolhttps://www.hse.gov.uk/MSd/pushpull/index.htm
  73. Push/pull riskshttps://www.hse.gov.uk/MSd/pushpull/risks.htm
  74. Push/pull risk assessmenthttps://www.hse.gov.uk/MSd/pushpull/assessment.htm
  75. The lawhttps://www.hse.gov.uk/MSd/legislation.htm
  76. Health monitoringhttps://www.hse.gov.uk/MSd/health-monitoring.htm
  77. Workershttps://www.hse.gov.uk/MSd/workers-msds.htm
  78. Resourceshttps://www.hse.gov.uk/MSd/resources.htm
  79. Upper limb disorders in the workplace https://www.hse.gov.uk/pubns/books/hsg60.htm
  80. Chartered Institute of Ergonomics and Human Factorshttp://www.ergonomics.org.uk/

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Updated: 2021-10-11