Exercise $6$

a$.$ Feasibility of the problem: ${\displaystyle \underset{?}{\overset{?}{}}}\frac{D_i}{P_i}=0\mathrm{.}6941$

${\displaystyle \underset{?}{\overset{?}{}}}{A}_i=2695$;${\displaystyle \underset{?}{\overset{?}{}}}{h}_i^{\text{'}}{D}_i=230458\mathrm{.}4$

$T^{**}=0\mathrm{.}1529$ year $=38\mathrm{.}23$ days

Second check: this solution is feasible as $T_{\text{m}\text{i}\text{n}}=0\mathrm{.}04$ year

b$.2\mathrm{.}52\%$Exercise $6$

Bali produces several styles of men's and women's shoes at a single facility near Bergamo, Italy. The

leather for both the uppers and the soles of the shoes is cut on a single machine. This Bergamo plant is

responsible for seven styles and several colors in each style. The colors are not considered different

products for our purposes, because no setup is required when switching colors. Setup costs are

proportional to setup times. The firm estimates that setup costs amount to an average of $$110$ per hour,

based on the cost of worker time and the cost of forced machine idle time during setups. Holding costs

are based on a $22$ percent annual interest charge. Assume $8$ working hours in a day and $250$ working days

per year.

a$.$ Determine the best schedule for cutting the shoes using a rotation policy that meets all demand

and minimizes setup and holding costs.

b$.$ What is the worst case performance of the proposed rotation schedule?Exercise $6$

Bali produces several styles of men's and women's shoes at a single facility near Bergamo, Italy. The

leather for both the uppers and the soles of the shoes is cut on a single machine. This Bergamo plant is

responsible for seven styles and several colors in each style. The colors are not considered different

products for our purposes, because no setup is required when switching colors. Setup costs are

proportional to setup times. The firm estimates that setup costs amount to an average of $$110$ per hour,

based on the cost of worker time and the cost of forced machine idle time during setups. Holding costs

are based on a $22$ percent annual interest charge. Assume $8$ working hours in a day and $250$ working days

per year.

a$.$ Determine the best schedule for cutting the shoes using a rotation policy that meets all demand

and minimizes setup and holding costs.

b$.$ What is the worst case performance of the proposed rotation schedule?

How do i get these awnsers?