Stimulus in the purchase situation experienced by consumers have a role in consumer unplanned purchases. When a customer was walking in a supermarket and see the discounts on shoes, consumers considering the purchase.
Passion of consumer interest in discounts evoke a desire to try and become involved in previously unplanned purchases. But the intention to make unplanned purchases are going to change because consumers consider the needs, values and interest in these shoes. If the perceived need is not urgent, the product which will be bought has low value and consumers felt less keen to have it, then unplanned purchase will not happen.