4. Concept Selection and Product Architecture - L-Division-2018-2019/repo2 GitHub Wiki

List of Objectives-

1)Picking Ability 2)Ease of use 3)Ability to load 4)Cost 5)Use of standard parts

Weightage assigned to the Objectives:

Objectives	Weightage
Picking ability	9
Ease of use	8
Ability to load	7
Cost	7
Use of standard parts	6

PUGH Chart

Objectives	Design Idea 1	Design Idea 2	Design Idea 3	Design Idea 4
Picking ability	-	Datum	0	-
Ease of use	0	Datum	0	0
Ability to load	0	Datum	0	-
Cost	+	Datum	0	--
Use of standard parts	0	Datum	-	-
Score(+)	7	0	0	0
Score(-)	9	0	6	36
Total	-2	0	-6	-36

Justification

1)Design 1

Objective	Score Given	Justification
Picking ability	-	As it is only two clawed its radius of picking objects is less
Ease of Use	0	It is used with a remote just like other designs
Ability to Load	0	It can load as much as the datum
Cost	+	It uses minimal parts as compared to others therefore cost efficient
Use of Standard Use	0	All the parts used in this design are easily available as compared to the datum

2)Design 2

Objective	Score Given	Justification
Picking ability	0	Datum
Ease of Use	0	Datum
Ability to Load	0	Datum
Cost	0	Datum
Use of Standard Use	0	Datum

3)Design 3

Objective	Score Given	Justification
Picking ability	0	It has a big metal claw picking up objects so it is pretty same as the shovel design
Ease of Use	0	It is remotely used just as other designs
Ability to Load	0	It has the same box as the datum so same amount materials can be stored
Cost	0	As we are not using very much different materials from the datum it is almost same as it is
Use of Standard Use	-	Metals claws are not readily available we will have to make it using single metal claw by joining with others

4)Design 4

Objective	Score Given	Justification
Picking ability	-	Its metal claws are smaller than the other designs
Ease of Use	0	Remotely controlled same as other designs
Ability to Load	-	We have to use an external bag in order to store the waste
Cost	--	Robotic legs are very costly compared to the other wheels
Use of Standard Use	-	As robotic legs are difficult to get it is not recommended

The Best Concept Selected is Design Idea 2.

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Clustering of Functions and Sub-Functions into Sub-System in a Functional Tree

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Identified List of Sub-Systems:

1)Movement 2)Collection of the Waste

Functional Tree v/s Component Hierarchy

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System Interaction Details table

1.Sub-System 1 movement

Interactions	Sub System 2collection of waste
Energy interaction	NO
Data interaction	YES
Material interaction	YES
Spatial interaction	YES

2.Sub-System 2collection of waste

Interactions	Sub System 1movement
Energy interaction	YES
Data interaction	NO
Material interaction	YES
Spatial interaction	YES