The constraints identified in the design showing in figure 1are technical constraints and economic constraints. It represents some functional relationships among the design variables and other design parameters satisfying certain physical phenomenon and certain resource limitations. Constraints may have exact mathematical expressions or not. In most of the cases it could be either equality or inequality type constraints.

LDR BLUETOOTH HC-06 ARDUINO AMTEL GA328P DRIVER MOTOR L298 DC mtor ULTRASONIC SENSOR BATTERY SOLAR PANEL Figurel: automatic vacuum cleaner LDR BLUETOOTH HC-06 ARDUINO AMTEL GA328P DRIVER MOTOR L298 DC mtor ULTRASONIC SENSOR BATTERY SOLAR PANEL Figurel: automatic vacuum cleaner