Advertisements
Advertisements
Question
Choose the correct alternative:
Machine | Job | |||
A | B | C | D | |
I | 5 | 6 | 8 | 4 |
II | 4 | 7 | 9 | 10 |
The optimal sequence for above data is
Options
CDBA
DBCA
BCDA
ABCD
Solution
DBCA
APPEARS IN
RELATED QUESTIONS
A machine operator has to perform two operations, turning and threading on 6 different jobs. The time required to perform these operations (in minutes) for each job is known. Determine the order in which the jobs should be processed in order to minimize the total time required to complete all the jobs. Also find the total processing time and idle times for turning and threading operations.
Job | 1 | 2 | 3 | 4 | 5 | 6 |
Time of turning | 3 | 12 | 5 | 2 | 9 | 11 |
Time for threading | 8 | 10 | 9 | 6 | 3 | 1 |
A company has three jobs on hand. Each of these must be processed through two departments, in the order AB where
Department A: Press shop and
Department B: Finishing
The table below gives the number of days required by each job in each department
Job | I | II | III |
Department A | 8 | 6 | 5 |
Department B | 8 | 3 | 4 |
Find the sequence in which the three jobs should be processed so as to take minimum time to finish all the three jobs. Also find idle time for both the departments.
An insurance company receives three types of policy application bundles daily from its head office for data entry and tiling. The time (in minutes) required for each type for these two operations is given in the following table:
Policy | 1 | 2 | 3 |
Data Entry | 90 | 120 | 180 |
Filing | 140 | 110 | 100 |
Find the sequence that minimizes the total time required to complete the entire task.
There are five jobs, each of which must go through two machines in the order XY. Processing times (in hours) are given below. Determine the sequence for the jobs that will minimize the total elapsed time. Also find the total elapsed time and idle time for each machine.
Job | A | B | C | D | E |
Machine X | 10 | 2 | 18 | 6 | 20 |
Machine Y | 4 | 12 | 14 | 16 | 8 |
Choose the correct alternative :
The objective of sequencing problem is
Choose the correct alternative :
In a 3 machine and 5 jobs problem, the least of processing times on machine A, B and C are 5, 1 and 3 hours and the highest processing times are 9, 5 and 7 respectively, then it can be converted to a 2 machine problem if order of the machines is:
Fill in the blank :
The time for which a machine j does not have a job to process to the start of job is called _______.
State whether the following is True or False :
The time involved in moving a job from one machine to another is negligibly small.
Solve the following problem :
Five jobs must pass through a lathe and a surface grinder, in that order. The processing times in hours are shown below. Determine the optimal sequence of the jobs. Also find the idle time of each machine.
Job | I | II | III | IV | V |
Lathe | 4 | 1 | 5 | 2 | 5 |
Surface grinder | 3 | 2 | 4 | 3 | 6 |
A toy manufacturing company produces five types of toys. Each toy has to go through three machines A, B, C in the order ABC. The time required in hours for each process is given in the following table.
Type | 1 | 2 | 3 | 4 | 5 |
Machine A | 16 | 20 | 12 | 14 | 22 |
Machine B | 10 | 12 | 4 | 6 | 8 |
Machine C | 8 | 18 | 16 | 12 | 10 |
Solve the problem for minimizing the total elapsed time.
Choose the correct alternative:
In solving 2 machine and n jobs sequencing problem, the following assumption is wrong
In assignment problem each worker or machine is ______ capable of handling any job
______ time is the time when the machine is available but is waiting for a job to be processed
State whether the following statement is True or False:
The idle time for a machine is the when machine is available but is not waiting for any job to be processed
The processing times required for four jobs A, B, C and D on machine M1 are 5, 8, 10 and 7 hours and on machine M2 it requires 7, 4, 3 and 6 hours respectively. The jobs are processed in the order Ml, M2. The sequence that minimises total elapsed time is ______
A publisher produces 5 books on Mathematics. The books have to go through composing, printing and binding done by 3 machines A, B, C. The time schedule for the entire task in proper unit is as follows :
Book | I | II | III | IV | V |
Machine A | 4 | 9 | 8 | 6 | 5 |
Machine B | 5 | 6 | 2 | 3 | 4 |
Machine C | 8 | 10 | 6 | 7 | 11 |
Determine the optimum time required to finish the entire task. Also, find idle time for machines A, B, C.