# Public Toilet

Topics: 5th millennium, 5000 Pages: 9 (1403 words) Published: March 20, 2013
G
B

F
A
1)
J
I
C

E

D

2) Cycle Time (CT) = Productive time per hour Output per day = 7 hrs./day X 60 min/hr X 60 sec/min 1008 units/day = 25,200 sec 1008 units = 25 sec/unit 6

5
4
3
2
1

3) Workstation =
J
I
G
H
F
E
C
D
B
A

Task Time 24 25 25 25 25 24 Idle Time = 1 0 0 0 0 1 ( Total = 2 sec )

4) WS = Sum of task times Cycle time (CT) = 148 sec 25 sec/units = 5.92 ˜ 6 units of WS

5) Efficiency = Sum of task times X 100% CT * Actual # of (WS) = 148 sec * 100 % ( 25 sec/units * 4 units of WS) = 98.67 %

6) Idle time per units = (CT * actual # of WS) – sum of task times = (25 sec/unit X 6 units of WS) – 148 seconds = 2 sec/units

Idle time in seconds per day = idle time per units X output per day (in unit) = 2 sec/unit X 1008units/day = 2016 sec/day Idle time in hour per day

= Idle time in seconds per day
60 min/hr X 60 sec/min = 2016 sec/day
60 min/hr X 60 sec/min
= 0.56 hr/day

Thus,
The cost of idleness per week = Idle time in hour per day X wage rate per hour X # working day per week = 0.56 hr/day X RM 40 per day = RM 22.40 per week

QUESTION 4
Claytan Fine China, a well-known dinner ware producer has upgraded its moulding procedure by using the most sophisticated equipment. The mouding process consists of 10 elements. The following table shows the task element in alphabetical order and their precedence element task(s) and times in seconds. Task Element| Precedence Task| Task Time (seconds)|

A| -| 24|
B| A| 25|
C| A| 13|
D| -| 10|
E| C, D| 12|
F| B, E| 11|
G| B| 15|
H| -| 14|
I| F,G.H| 10|
J| I| 24|

1. Draw a precedence diagram

2. If the expected weekly output is 5040 dinner sets and daily productive time is 7 hours (in a 5 day work-week), compute the cycle for the process.

3. Compute the theoretical number of workstations.

4. Arrange the task element into proper workstations by using the longest task-time heuristic/rule.

5. Calculate the efficiency of the balanced line and balance delay.

6. If the wage rate is RM 40 per day, calculate the idleness cost per week.

QUESTION...