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. 2018 Sep 10;45(5):456–464. doi: 10.1097/WON.0000000000000462

TABLE 2. Selected Usability Quality Characteristics.

Usability Quality Characteristics7 Metrics Chosen Incontinence Standard ISO 15621:2011
Overall usability Effectiveness Product fit: Estimate of success rate of achieving a good enough fit according to predefined parameters “The correct fixation and product fit to the body are very important and influence the leakage properties of any product.” (§5.2 Product-related factors: Freedom from leakage)
Efficiency Time on task: Estimate of success rate of finishing task within a specified time limit “The ease with which a urine-absorbing aid can be put on or taken off is important to all end-users.” (§4.8 User-related factors: Handling product)
Workload: Estimate of success rate of finishing task within a workload limit “When helping a person with incontinence with their personal hygiene and change of incontinence products, the ergonomy has to be considered.” (§6.1 Usage-related factors: Ergonomics)
Satisfaction User experience: Estimate of success rate of scoring product higher than a specification limit “If a carer is required to apply or change the product, then it may be important to involve him or her in the selection of the product and to establish his or her willingness and ability to use it.” (§6.2 Usage-related factors: Needs of carer)