10. Quality Requirements
10.1 Quality Tree
Note: The (1), (2), (3) in the following table repeat the top level quality requirements from chapter 1.2.
|Ease of Use (3)
|Ease of use by the policeman, especially in the use case of pursuing another car
|Ease of Learning
|The standard functions should be as easy and intuitive to use as possible without the need for lengthy prior instruction
|Measurements and calculations shall be correct and precise within the specified deviation range
|The algorithms used must be as legally watertight as possible and comprehensible
|Precision & Accuracy
|If possible, the video insertions should be made with the granularity of a video frame
|The system shall work reliable under all specified environment and operating conditions.
|Operational & Environmental
|The temperature range in which the correct functioning of the device is ensured should range from -25 degrees to +85 degrees
|Maintainability & Support
|Maintenance & Repair
|It should be possible to replace components outside the measurement box without affecting the correct measurement inside the measurement box
|Verifiability of the authenticity of the video files shall be ensured with a verification code
|Cultural and Regional
|the texts of the user interface should be able to be converted by a translation file into different languages with ASCII character set
|Local Time Adaptability
|The time difference to Greenwich must be adjustable with a granularity of 1 minute
|Local Legal Rules Adaptability
|the measurement procedure shall be adaptable to regional legislation
|Correct implementation and application of all legal requirements in the evaluation for the different types of pursuits
10.2 Quality Scenarios
|A user who does not know the system can operate it after 10 minutes of instruction
|When playing a video frame by frame afterwards, each frame contains exactly the expected information
|Even under maximum and minimum temperature (e.g. in a climatic chamber), the device always outputs the same speed at constant pulse frequency.
|With appropriate translation files replacing the default language (English), all displayed and printed texts now appear in this language.