Below are the prioritized objectives

1. Automated
2. Feasibility
3. Ease of use
4. Compact
5. Cost

Assigning weightage

Objectives	Weightage
Automated	9
Feasibility	8
Ease of use	7
Compact	6
Cost	5

PUGH Chart

Objectives	Weightage	Conceptual Design 1	Conceptual Design 2	Conceptual Design 3	Conceptual Design 4
Automated	9	Datum	0	0	++
Feasibility	8	Datum	--	0	-
Ease of use	7	Datum	+	-	--
Compact	6	Datum	+	+	+
Cost	5	Datum	-	-	--
+ score			+13	+6	+24
- score			-21	-12	-32
Total		0	-8	-6	-8

The Concept selected is 1(Datum).

Justification:

Design 2

1. The motor can't move with 5 servos (weight).
2. Movement of box is not automated.
3. Since Datum uses sliding mechanism, Rack and pinion mechanism occupies less space.
4. Using rack and pinion increases cost of system.

Design 3

1. Both are equally automated.
2. Both are equally Feasible.
3. As the playing machine is not fixed it will effect the alignment of strokes whereas in design 1 the strokes are well adjusted.
4. The usage of rails in Design 1 occupy more space whereas in design 3 playing system is compact.
5. The construction of playing machine in design 3 is comparatively expensive.

Design 4

1. In Comparison with datum better automated process can be done in design 1
2. Designing of this model is not easier in comparison with datum in view of feasibility.
3. It is difficult for the user to operate it.
4. Cost of designing this model is expensive compared to datum.

Glass box representation of product architecture: Clustering of sub system

Component Hierarchy

Identified sub systems are:

sl no.	sub systems name
1	controlling unit
2	User interactions unit
3	Indication unit
4	Piano playing unit

Sub system 1

-	sub system 2	sub system 3	sub system 4
Energy interaction	+	+	+
data interaction	+	+	+
Material interaction	-	-	-
Spatial interaction	-	-	+

Sub system 2

-	sub system 1	sub system 3	sub system 4
Energy interaction	-	+	-
data interaction	-	+	+
Material interaction	-	-	-
Spatial interaction	-	-	+

Sub system 3

-	sub system 1	sub system 2	sub system 4
Energy interaction	-	-	-
data interaction	-	-	+
Material interaction	-	-	-
Spatial interaction	-	-	-

Sub system 4

-	sub system 1	sub system 2	sub system 3
Energy interaction	-	-	-
data interaction	+	+	+
Material interaction	-	-	-
Spatial interaction	-	-	-

Explanation:

1. Between controlling unit and user interaction, indication unit and piano playing unit unit there is a energy interaction in the form of electrical energy.
2. There is data interaction in the form of program between controlling unit and user interaction unit, indication unit and piano playing unit.
3. There is no material interaction between any of the sub systems.
4. Spatial interaction exits between controlling unit and piano playing unit.