gcse economics - demand and supply - changes in supply

It is possible that supply may change for reasons other than price

INCREASE IN SUPPLY OF A GOOD

1. Cheaper raw materials (more profitable)
2. More efficient production
3. Better productivity
4. New technology

DECREASE IN SUPPLY OF A GOOD

1. More expensive raw materials (less profitable)
2. Less efficient production
3. Poor productivity
4. Poor weather / harvest

SUPPLY INCREASE ON A DIAGRAM

In the example above producer(s) have increased their supply of a good.

It may be because raw materials are cheaper and they believe that they can make more profit on each good
or it could be because they have better technology.

The supply curve has SHIFTED from S1 to S2

ACTION

A Again do the same for a fall in supply where the supply curve shifts to the left