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Explain the term- Phased
In this approach only part of the new system is introduced and only when it proves to work satisfactorily is the next part introduced and so on, until old system is fully replaced
- If latest part fails, only need to go back in system to the point of failure; thus a failure isn't disastrous
- More expansive than direct because it is essential to evaluate every phase before moving to the next stage
- can ensure system works properly before expanding
The below table summarises the risks involved in all 4 methods:
Draw the Context level DFD for the Safe home Software. User commands Alarm type Telephone Number tone Sensor status Display Information
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what do i do and how?
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What is Control Chart? Ans) A statistical method for distinguishing among common and special cause variation exhibited by processes.
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