Table 2. Usability problems in the UAF translation phase with their severity and potential effect on task outcome.
| ID No. | Level 1 | Level 2 | Level 3 | Level 4 | Description of usability problem | No.1 | Severity | Identifying potential outcomes2 |
|---|---|---|---|---|---|---|---|---|
| 5 | Translation | Existence | Existence of a way | The user calculates, or even guesses, the BMI with a calculator outside the system. | 8 | 3 | Wrong dosage | |
| 6 | Existence | Existence of a way | The user calculates the needed dosage of gentamicin with a calculator outside the system. The user mentions that it would be helpful if the dosage is calculated by the system. | 3 | 4 | Wrong dosage | ||
| 7 | Existence | Existence of a way | User has to fill in the weight and body height of the patient. This information is not automatically retrieved from the hospital information system. User expresses the wish that dosage of antibiotic is calculated with automatic retrieved weight and body height. | 1 | 2 | Wrong dosage | ||
| 8 | Existence | Existence of a way | The user has to select a working diagnosis from a drop down menu. After selecting a working diagnosis it is not clear how to go back to the previous step in the system. | 1 | 3 | None | ||
| 9 | Presentation | Perceptual issues | Noticeability | The user does not know (immediately) how to perform a request for another patient. | 4 | 1 | None | |
| 10 | Presentation | Perceptual issues | Noticeability | The user does not use the filter to assemble possible resistant micro-organisms in the resistance overview profile, which shows the culture history (if filter is not being used resistant micro-organisms can be overlooked). | 1 | 0 | Wrong antibiotic | |
| 11 | Presentation | Perceptual issues | Noticeability | User does not view the overview of AST3, and the materials (for example sputum, urine and blood) in the resistance overview profile which shows the culture history. | 2 | 0 | Wrong antibiotic | |
| 12 | Presentation | Perceptual issues | Noticeability | Overview of resistance, which shows the culture history, is not seen immediately. | 1 | 2 | Wrong antibiotic | |
| 13 | Presentation | Perceptual issues | Noticeability | Mouse over info about difference between HAP4 and CAP4 is not viewed. | 3 | 2 | Wrong antibiotic | |
| 14 | Presentation | Perceptual issues | Noticeability | Mouse over info about severity of pneumonia is not viewed. Argument for severity classification is not correct. | 3 | 2 | Wrong antibiotic | |
| 15 | Presentation | Perceptual issues | Noticeability | User overlooks the information provided about the ESBL5 positivity of the patient. | 1 | 0 | Wrong antibiotic |
1 The number of usability problems with the same classification path, in the interaction of different or the same user with the system.
2The mentioned outcomes are potential and did not have to occur.
3 AST: Antibiotic Susceptibility Tests.
4HAP: hospital acquired pneumonia, CAP: community acquired pneumonia.
5 ESBL: extended spectrum betalactamase