– the degree of impact (seriousness) a defect has on the product functionality.
Severity level is based on the technical aspect of the product, determined by the QA engineer as severity is driven by functionality.
Priority – the order (how soon) in which a defect should be fixed/resolved by a developer.
Priority status of defects is based on the customer requirements and is decided in consultation with the manager/client since priority is driven by business value.
- A critical bug is extremely rare
- There are no workarounds
- Show stopper, complete shut-down of the process, nothing can proceed further;
- Mission critical bugs to the core functionality of the application;
- The defect affects the system severely/very high impact/blocking issue and product cannot be used until it is fixed;
- Defect absolutely must be fixed right away/NOW/ASAP;
- This one bug would delay the launch/release of a product
- Unable to log in;
- Cannot check out or save my shopping cart;
- An email client that has a bug that prevents users from sending/receiving emails,
- Browser/App crash
- Bugs that are related to the core functionality of the application
- High impact, highly severe defect that causes the collapse of the system functionality.
- However, certain parts of the system remain functional.
- There are workarounds
- Defect should be resolved ASAP, but don’t have to be fixed before product launch.
- Issues can wait to be resolved in the first available patch/ next release after launch.
- A flash demo doesn’t load properly
- A bug tracking application that does not allow users to set a bug type/priority
- A typo in the large text of the homepage banner
- Bugs that do not affect any critical user functionality
- Not a big impact, bug causes some undesirable behavior, but the system is still functional
- There are workarounds that allow users to accomplish the desired task
- Should be fixed but not urgently.
- Bug can wait until the next release.
- A travel site that randomly fails to send email notifications
- search results page that displays the right results, but formats incorrectly in Chrome browser etc.
- Application is fully functional; bugs do not interfere with the core product functionality
- Not a big impact, defects are just irritating annoyances (e.g. spelling or minor GUI problems)
- There are workrounds/the workarounds are not needed to allow users to accomplish the desired task
- Defects may or may not ever be fixed.
Repair can be done once the more serious defects have been resolved
- A misspelling in the middle of an interior page;
- Text is displayed in the wrong location/overlaps;
- The sitemap loads improperly in IE6.