Below are the identified and prioritised objectives.

• 1.Rugged in nature
• 2.Durable
• 3.Easy to use
• 4.Cost effective

Assign weightage for the stated objectives.

Objectives	Weightage
Rugged in nature	8
Durable	7
Easy to use	5
Cost effective	3

Pug Chart

Objectives	Weightage	Design idea 1	Design idea 2	Design idea 3	Design idea 4
Rugged in nature	8	++	Datum	+	-
Durable	7	+	Datum	-	+
Easy to use	5	++	Datum	--	+
Cost effective	3	-	Datum	--	+
+Score		+33	0	+8	15
-Score		-3	0	-23	-8
Total		+30	0	-15	7

The Best Concept selected is Design No.1

Justification:

Design idea no	Objective	Score Given	Justification
1	Rugged in nature	+16	open belt drive is used to excavate soil,use of standard parts
	Durable	+7	long life of belt drive
	Easy to use	+10	used through remote control and low maintenance of belt drive
	Cost effective	-3	standard parts used,hence amount of iron used is more
3	Rugged in nature	+8	robotics legs makes bot stable
	Durable	-7	amount of power required is high by this bot
	Easy to use	-10	movement of bot(legs) is slow
	Cost effective	-6	has the robotic legs & camera is used so its more expensive
4	Rugged in nature	-8
	Durable	+7
	Easy to use	+5
	Cost effective	+3