RELATIONSHIP MATRIX
9 - STRONG
3 - MEDIUM
1 - WEAK
CORRELATION MATRIX
o
x
Positive
Negative
x
o
o
OPERATION Easy to close
Stays open on a hill
Easy to open
Doesn't kick back
Doesn't leak in heavy rain
ASSEMBLY
What Is Its Purpose?
To join components, formless material, and
sub-assemblies into a Complex Product
Comp A
SubAssembly
PAINT
Comp B
Final
PRODUCT
Comp C
Assembly
WHY ASSEMBLE?
1) Movement b
ME557DesignForManufacturability
Fall2013
LECTUREOUTLINE
Week
D a te
Topic
Reading
Assignment
Homework
1
Au g1 9 1 3
Con cu rren tE n gin eerin g
.
.
.
Au g2 1 1 3
Design Process
Dieter(D)1 .1
1 .5
.
STATISTICS
How can we estimate population parameters from a
random sample?
Given a large enough set of
observations, we can look at the distribution of values.
Example
Frequency Distribution of Dat
ME 557 Design for Manufacturability
Statistics Review Problems
Problem 1
The diameters of a batch of ball bearings are known to follow
normal distribution with a mean 4.0 in and a standard
deviation 0
PROBABILITY
Probability deals with the laws of chance which govern
the occurrence of random events.
Definitions:
P(A)
the probability that an event A will occur
P(A) = 0 A is an impossibility
P(A) =
DIMENSIONING ENGINEERING DRAWINGS
Engineering Drawings are used to convey shape
information.
Types of Drawings:
- Detail drawing: typically provides 3 views with
dimensions, and material and surface
DESIGN FOR MANUFACTURABILITY
What: Integrating product design with
downstream production issues
Why:
Lower production cost
Higher quality
Quicker time to market
When: Product concept through produc
QUALITY FUNCTION DEPLOYMENT
Translate the customer wishes into the design of a
product.
Utilizes the House of Quality.
Targets what needs to be designed first; versus how
the design will look and work
IMPORTANCE OF DESIGN IN DFM
By the time the design is finished less than 10% of
the product cost has been spent yet 80% of the cost
has been committed!
WHAT IS DESIGN?
DESIGN is the PROCESS by which P