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Stability factors & Biasing circuits:
An idea about biasing and stabilization will help in the study of Stability factors -plz check the following paragraph.
Things to be ensured before wiring an amplifier:
Before setting up an amplifier circuit, operating point should be fixed at an appropriate position on the load line - preferably at the center of the load line. This can be done with the help of a biasing circuit. It is also to be ensured that the operating point does not shift due to changes in temperature or due to variations in transistor parameters(see explanation below) - in other words operating point should be stable.
The maintenance of the operating point stable is known as stabilization.