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Week 5
1.
2.
3. 2.1 Manufacturing process sequence
- What is your primary process? Why did you choose this
process?
Casting because switch made from plastic and globe made from resin that two
equipment use to casting for have a basic shape or standard shape.
-What is your secondary process? Why did you choose this
process?
Drilling , because when we use a product it should be fix at the shoes for protect
it when dropping.
- What is your tertiary process? Why did you choose this
process?
Joining , because our product use electrical circuit we use it connect with wire
and assemble it with shoes
Painting , If you want trendy shoes .
4.
5. 2.2 Product function
-With your selected material, how is your material compatible
with product geometry and manufacturing processes?
Size of electrical circuit suitable for base of shoes because electrical
circuit is small and shoes are imbedded into base of shoes. Size of shoes
depend on people who wear it.
-What is the normal applied load to the material? Can your
material take such load?
The product receive load from weight of people who use our product
we put it into place which this area receive load at least by put it left
side of foot.
to receive load.
6. -What is the normal ambient conditions to your
material?
Load from foot weight. Temperature are increasing. You should keep it
away from sun light. You can tread water because we cover it by using
plastic cover it.
-With your selected manufacturing process, how is
your process compatible with the product geometry?
Electrical circuit is designed is cycle because cycle is suitable for dry cell
and save area to receive load.
7.
8. Manufacturing cost calculation
The material costs per part can be calculated as:
Let M = total materials costs (raw, bulk)
q = production quantity
The material costs per part, cM is
cM = M/q = (cost/weight x weight) / number of parts
Let
cw = material cost per unit weight
wp = weight of finished part
ww= weight of wasted material, scrap
a = ratio of wasted material weight / finished weight
= ww / wp
9. Then the material cost per part, cM is
cM = cw (wp + ww ) = cw (wp + awp )
cM = cw *wp (1+ a)
cM = cw *wp (1+ a)
cM = (120 baht/ part)*(0.09 kg / part)*(1+0)
= 10.8 baht/part
10. The tooling cost per part, cT is
Let
T= total cost of molds, fixtures per production run
q = number of parts per run
Then
cT= T/q
cT= T/q
T=0
=0
11. The processing cost per part, cP is
Let
ct = cost per hour, (machine rate + labor)
t = cycle time (hours per part)
then cP = c t t
cP = c t t
= (baht 25 / hr)*(0.25 hrs/part)
= 6.25 baht / part
12. As a result, total cost per part is
c = cM + cT + c P
c = cw wp (1+ a) + T/q + ct t
c = cM + cT + cP
= (10.8 + 0 + 6.25) baht/part
= 17 baht/part