Efficiency can only be affected by 4 factors:

    • AVAILABILITY: the process stops and it is not working due to failures or idle periods OR there were no results during the time that could have been used for production.
    • SPEED: results are not obtained in the expected time.
    • QUALITY: results are not good enough, so they are discarded or reworked.
    • CONSUMPTION: more energy or resources than necessary are used to produce the results.