Briefly explain (with the aid of a diagram) the evolutionary approach to system development and under what circumstances the use of the approach is appropriate/inappropriate. Briefly explain (with the...

Briefly explain (with the aid of a diagram) the evolutionary approach to system development and under what circumstances the use of the approach is appropriate/inappropriate. Briefly explain (with the aid of a diagram) the spiral approach to system development and under what circumstances the use of the approach is appropriate/inappropriate.