Why Shift Left approach is necessary

Survey suggest that the cost of fixing a bug increases as a project move towards next stages in software development life cycle (SDLC). Detecting a bug early and fixing it immediately does not cost much. But if detecting it later or after production release, the result can be disastrous. 

Due to this reason shift left approach is introduced.

In Shift left testing, testing is shifted towards left in SDLC (software development lifecycle), rather than testing at the end of the lifecycle.This approach allows developers to pay attention on quality right from the starting rather than waiting for bugs to be discovered late in the development life cycle.

Generally testing is done when development is in the coding phase that means testing is aimed at incorrect phase of development which might be neglecting many of the defects. Many defects occur during the requirement phase than during the coding phase of the project. 

Using shift-left approach, it results in the following benefits:

1. Bugs are detected and fixed early.
2. Saving time and resources
3. Better team work between developers and testers
4. Cost effectiveness

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