An increase in supply is likely to be witnessed due to factors such as technological innovation and the entry of new firms. This will result in a right-side shift in the supply curve. On the other hand, a decrease in supply can be seen when technological decay and exit of existing firms takes place. All these changes will affect the production and hence, supply, which can be illustrated in a shift of supply curve. You must know more about change and shift factors from our experts at Vedantu.