Katie Posh runs an upscale nail salon. The service process includes five activities that are conducted in the sequence described below. (The time required for each activity is shown in parentheses): Activity 1: Welcome a

Katie

Posh

runs

an

upscale

nail

salon.

The

service

process

includes

five

activities

that

are

conducted

in

the

sequence

described

below.

(The

time

required

for

each

activity

is

shown

in

parentheses):

Activity

1:

Welcome

a

guest.

(1

minute)

Activity

2:

Clip

and

file

nails.

(3

minutes)

Activity

3:

Paint.

(5

minutes)

Activity

4:

Dry.

(10

minutes)

Activity

5:

Check

out

the

customer.

(4

minutes)

Three

servers

(S1,

S2,

and

S3)

offer

the

services

in

a

worker-­‐paced

line.

The

assignment

of

tasks

to

servers

is

the

following:

S1

does

Activity

1.

S2

does

Activities

2

and

3.

S3

does

Activities

4

and

5.

The

drying

process

does

not

require

server

3’s

constant

attention;

she/he

needs

to

only

escort

the

customer

to

the

salon’s

drying

chair

(equipped

with

fans

for

drying).

The

time

to

do

this

is

negligible.

There

exists

only

one

drying

chair

in

the

salon.

PN1.

Which

resource

is

the

bottleneck

of

the

process?

PN2.

What

is

the

utilization

of

server

2?

Assume

that

there

is

unlimited

demand

and

that

the

process

only

admits

customers

at

the

rate

of

the

bottleneck.

PN3.

What

is

the

average

labor

utilization

of

the

servers?

Assume

that

there

is

unlimited

demand

and

that

the

process

only

admits

customers

at

the

rate

of

the

bottleneck.

PN4.

Assume

a

wage

rate

of

$12

per

hour.

What

are

the

direct

labor

costs

for

one

customer?