MTech $2$: Assignment $$ Lean manufacturing & Quality Control

$1.$ Explain each of $7$ types of wastes.

Quality Tools Description Why it is considered a waste

Over$-$production

Queuse $/$ waiting

Transportation

Inventory

Motion

Over$-$processing

Defective product

$[50$ marks$]$

$2.$ Plastic extrusion machine is producing household products. Sampling from the production line

found that the average critical cross$-$sectional dimension of the products $=29\mathrm{.}5$ mm and standard

deviation $=0\mathrm{.}83$ mm$.$ Assume the process is in statistical control. If the design specification for the

critical cross$-$sectional dimension $=30+/-2\mathrm{.}0$ mm$,$ determine:

i$.$ Process Capability, CPk$.$

$[25$ marks$]$

ii$.$ Expected $\%$ of products to be out of specification.