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Part $1$

A typical retail transaction consists of several smaller$$ steps, which can be considered components subject to failure. A list of such components might$$ include:

Component

Description

Definition of Failure

$1$

Find product in proper$$ size, color, etc.

$$Can$\text{'}$t find product

$2$

Enter cashier line

No lines$$ open; lines too$$ long; line experiencing difficulty

$3$

Scan product UPC for$$ name, price, etc.

$$Won$\text{'}$t scan; item not on$$ file; scans incorrect name or price

$4$

Calculate purchase total

Wrong$$ weight; wrong$$ extension; wrong data$$ entry; wrong tax

$5$

Make payment

Customer lacks$$ cash; check not$$ acceptable; credit card refused

$6$

Make change

Makes change incorrectly

$7$

Bag merchandise

Damages merchandise while$$ bagging; bag splits

$8$

Conclude transaction and exit

No$$ receipt; unfriendly,$$ rude, or aloof clerk

Let the eight probabilities of success be $0\mathrm{.}92,0\mathrm{.}93,0\mathrm{.}97,0\mathrm{.}98,0\mathrm{.}97,0\mathrm{.}97,0\mathrm{.}92,$ and $0\mathrm{.}94.$

Part $2$

The overall reliability of the$$ system, that$$ is$,$ the probability that there will be a satisfied customer$=$

$$

enter your response here$\%($enter your response as a percentage rounded to two decimal$$ places$).$

Part $3$

If you were the store$$ manager, based on the probability of a satisfied$$ customer, the$$ store's performance is

$$

not acceptable

acceptable

$.$

Part $4$

Following are appropriate backup options to components to improve performance $($select all that$$ apply$)$:

A$.$

Override incorrect scan

B$.$

Carry more inventory

C$.$

Ask customer to have more cash

D$.$

Open more cashier lines

Part $5$

Following are some appropriate actions in terms of redesign to improve performance $($select all that$$ apply$)$:

A$.$

Bagging operation

B$.$

Customer exit

C$.$

Process improper checks

D$.$

Store more inventory