dido:public:ra:1.4_req:2_nonfunc:30_usability
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dido:public:ra:1.4_req:2_nonfunc:30_usability [2020/11/20 19:01] nick |
dido:public:ra:1.4_req:2_nonfunc:30_usability [2021/08/06 17:08] (current) murphy |
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| - | ====== 4.2.10 Usability ====== | + | ====== 4.3.6 Usability ====== |
| [[dido:public:ra:1.4_req:2_nonfunc| Return to Non-Functional Requirements]] | [[dido:public:ra:1.4_req:2_nonfunc| Return to Non-Functional Requirements]] | ||
| ===== About ===== | ===== About ===== | ||
| - | [[dido:public:ra:1.4_req:2_nonfunc:30_usability| Return to Top]] | ||
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| [[dido:public:ra:xapend:xapend.a_glossary:u:usability]] is defined by [[dido:public:ra:xapend:xapend.b_stds:tech:iso:square_sys_model]] as the degree to which a product or system can be used by [[dido:public:ra:xapend:xapend.a_glossary:s:stakeholder]] (i.e., specified users) to achieve specified [[dido:public:ra:xapend:xapend.a_glossary:g:goal | goals]] within a specified context. | [[dido:public:ra:xapend:xapend.a_glossary:u:usability]] is defined by [[dido:public:ra:xapend:xapend.b_stds:tech:iso:square_sys_model]] as the degree to which a product or system can be used by [[dido:public:ra:xapend:xapend.a_glossary:s:stakeholder]] (i.e., specified users) to achieve specified [[dido:public:ra:xapend:xapend.a_glossary:g:goal | goals]] within a specified context. | ||
| - | ==== Goals ==== | + | ==== Goals ==== |
| - | The goals are(( | + | The goals of usability are(( |
| Justin Mifsud, __Usability Metrics – A Guide To Quantify The Usability Of Any System__, Accessed 18 November 2020, [[https://usabilitygeek.com/usability-metrics-a-guide-to-quantify-system-usability/]] | Justin Mifsud, __Usability Metrics – A Guide To Quantify The Usability Of Any System__, Accessed 18 November 2020, [[https://usabilitygeek.com/usability-metrics-a-guide-to-quantify-system-usability/]] | ||
| )): | )): | ||
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| - **Satisfaction** - The comfort and acceptability of use. | - **Satisfaction** - The comfort and acceptability of use. | ||
| - | * **Note:** See also | + | ==== Sub-Characteristics ==== |
| - | + | ||
| - | ==== Sub-Characteristics ==== | + | |
| This characteristic is composed of the following sub-characteristics(( | This characteristic is composed of the following sub-characteristics(( | ||
| [[dido:public:ra:xapend:xapend.a_glossary:i:iso]], __Usability__, ISO25000, Accessed: 17 November 2020, | [[dido:public:ra:xapend:xapend.a_glossary:i:iso]], __Usability__, ISO25000, Accessed: 17 November 2020, | ||
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| * //**[[dido:public:ra:xapend:xapend.a_glossary:l:learnability]]** - Degree to which a product or system can be used by specified users to achieve specified goals of learning to use the product or system with effectiveness, efficiency, freedom from risk and satisfaction in a specified context of use.//[[dido:public:ra:1.4_req:2_nonfunc:30_usability#fn__1| (1)]] | * //**[[dido:public:ra:xapend:xapend.a_glossary:l:learnability]]** - Degree to which a product or system can be used by specified users to achieve specified goals of learning to use the product or system with effectiveness, efficiency, freedom from risk and satisfaction in a specified context of use.//[[dido:public:ra:1.4_req:2_nonfunc:30_usability#fn__1| (1)]] | ||
| * //**[[dido:public:ra:xapend:xapend.a_glossary:o:operability]]** - Degree to which a product or system has attributes that make it easy to operate and control.//[[dido:public:ra:1.4_req:2_nonfunc:30_usability#fn__1| (1)]] | * //**[[dido:public:ra:xapend:xapend.a_glossary:o:operability]]** - Degree to which a product or system has attributes that make it easy to operate and control.//[[dido:public:ra:1.4_req:2_nonfunc:30_usability#fn__1| (1)]] | ||
| - | * //**[[dido:public:ra:xapend:xapend.a_glossary:u:user_error_protection]]** - Degree to which a system protects users against making errors.//[[dido:public:ra:1.4_req:2_nonfunc:30_usability#fn__1| (1)]] | + | * //**[[dido:public:ra:xapend:xapend.a_glossary:u:uerror_protection]]** - Degree to which a system protects users against making errors.//[[dido:public:ra:1.4_req:2_nonfunc:30_usability#fn__1| (1)]] |
| - | * //**[[dido:public:ra:xapend:xapend.a_glossary:u:user_interface_aesthetics]]** - Degree to which a user interface enables pleasing and satisfying interaction for the user.//[[dido:public:ra:1.4_req:2_nonfunc:30_usability#fn__1| (1)]] | + | * //**[[dido:public:ra:xapend:xapend.a_glossary:u:interface_aesthetics]]** - Degree to which a user [[dido:public:ra:xapend:xapend.a_glossary:i:interface|interface]] enables pleasing and satisfying interaction for the user.//[[dido:public:ra:1.4_req:2_nonfunc:30_usability#fn__1| (1)]] |
| * //**[[dido:public:ra:xapend:xapend.a_glossary:a:accessibility]]** - Degree to which a product or system can be used by people with the widest range of characteristics and capabilities to achieve a specified goal in a specified context of use.//[[dido:public:ra:1.4_req:2_nonfunc:30_usability#fn__1| (1)]] | * //**[[dido:public:ra:xapend:xapend.a_glossary:a:accessibility]]** - Degree to which a product or system can be used by people with the widest range of characteristics and capabilities to achieve a specified goal in a specified context of use.//[[dido:public:ra:1.4_req:2_nonfunc:30_usability#fn__1| (1)]] | ||
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| * [[dido:public:ra:xapend:xapend.b_stds:tech:iso:ergonomics]] | * [[dido:public:ra:xapend:xapend.b_stds:tech:iso:ergonomics]] | ||
| - | ===== Metrics ===== | + | ==== Metrics ==== |
| - | [[dido:public:ra:1.4_req:2_nonfunc:30_usability| Return to Top]] | + | [[dido:public:ra:1.4_req:2_nonfunc:30_usability| Return to the Top]] |
| Usability as a characteristic is often considered a subjective quality and left to "interpretation", however, there are metrics which use to quantify these sub-characteristics. Before we delve into the definition of the specific metrics, it is important to understand why we need metrics rather than just rely on intuitive evaluations. | Usability as a characteristic is often considered a subjective quality and left to "interpretation", however, there are metrics which use to quantify these sub-characteristics. Before we delve into the definition of the specific metrics, it is important to understand why we need metrics rather than just rely on intuitive evaluations. | ||
| - | A core reason to collect Usability Metrics is to provide a data about stakeholder's understanding about a product's usability rather than the developer's understanding of usability. When the two understandings (i.e., interpretations) converge everyone is happy and a way forward can result. That result may be to either continue in the same direction or to have a reassessment of the user's needs. | + | A core reason to collect Usability Metrics is to provide data about a stakeholder's understanding of a product's usability rather than the developer's understanding of usability. When the two understandings (i.e., interpretations) converge everyone is happy resulting in a way forward. That result may be to either continue in the same direction or to have a reassessment of the user's needs. |
| The metrics must quantify that the system meets the [[dido:public:ra:1.4_req:2_nonfunc:30_usability#goals| goals]] of the overall system: | The metrics must quantify that the system meets the [[dido:public:ra:1.4_req:2_nonfunc:30_usability#goals| goals]] of the overall system: | ||
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| * [[dido:public:ra:1.4_req:2_nonfunc:30_usability:satisfaction]] | * [[dido:public:ra:1.4_req:2_nonfunc:30_usability:satisfaction]] | ||
| + | ===== DIDO Specifics ===== | ||
| + | [[dido:public:ra:1.4_req:2_nonfunc:30_usability| Return to the Top]] | ||
| - | + | : <wrap hi><color red> To be added/expanded in future revisions of the DIDO RA </color></wrap> | |
| - | ==== DDS Specifics Metrics ==== | + | |
| - | [[dido:public:ra:1.4_req:2_nonfunc:30_usability| Return to Top]] | + | |
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| ~~DISCUSSION:on|Outstanding Issues~~ | ~~DISCUSSION:on|Outstanding Issues~~ | ||
| ~~DISCUSSION:off~~ | ~~DISCUSSION:off~~ | ||
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dido/public/ra/1.4_req/2_nonfunc/30_usability.1605916878.txt.gz · Last modified: 2020/11/20 19:01 by nick
