The probabilistic time is given by (where to = Optimistic time, tp = Pessimistic time, and tn = Most likely time)
(to + tp + tn)/3
(to + 2tp + tn)/4
(to + 4tp + tn)/5
(to + tp + 4tn)/6
Correct Answer :
D. (to + tp + 4tn)/6
Related Questions
Gantt charts provide information about
Breakeven point analysis
Production schedule
Material handling layout
Determining selling price
The first method invented for planning projects was
Bar chart method
Milestone chart
Critical path method (CPM)
Programme evaluation and review technique (PERT)
Micro-motion study is
Analysis of one stage of motion chart
Motion study, when seen on a time chart
Subdivision of an operation into therbligs and their analysis
Enlarged view of motion study
Which of the following is not wage incentive plan?
Differential piece rate system
Rowan plan
Emerson plan
Taylor plan
For handling materials during manufacture of cement, a _________ is widely used.
Belt conveyor
Bucket conveyor
Fork lift truck
Overhead crane
The main object of scientific layout is
To produce better quality of product
To utilise maximum floor area
To minimise production delays
All of these
One time measurement unit (TMU) in method time measurement system equals
0.0001 minute
0.0006 minute
0.006 minute
0.001 minute
In jobbing production
Highly skilled workers are needed
Unit costs are high
Operations are labour-intensive
All of these
The reasons which are basically responsible for the formation of a queue should be that
The average service rate Hess than the average arrival rate
Output rate is linearly proportional to input
Output rate is constant and the input varies in a random manner
All of the above
Bar chart is suitable for
Large project
Major work
Minor work
All of these
For ship vessel industry the following layout is best suited
Process layout
Product layout
Fixed position layout
Plant layout
CPM is the
Time oriented technique
Event oriented technique
Activity oriented technique
Target oriented technique
Breakeven analysis is a
Short term analysis
Long term analysis
Average of short and long term analysis
Any one of these
Micro motion study is
Analysis of a man-work method by using a motion picture camera with a timing device in the field of view
Motion study observed on enhanced time intervals
Motion study of a sequence of operations conducted systematically
Study of man and machine conducted simultaneously
Templates are used for
A planning layout
Flow of material
Advancing a programme in automatic machines
Copying complicated profiles
When slack of an activity is negative
It represents a situation where extra resources are available and the completion of project is not delayed
It represents that a programme falls behind schedule and additional resources are required to complete the project in time
The activity is critical and any delay in its performance will delay the completion of whole project
All of the above
Choose the wrong statement. Motion study is used for
Improving a work method
Improvising a work method
Designing a work method
Reducing inventory costs
A PERT network has three activities on critical path with mean time 3, 8 and 6 and standard deviations 1, 2 and 2 respectively. The probability that the project will be completed in 20 days is
0.50
0.66
0.84
0.95
Choose the wrong statement Time study is used to
Determine overhead expenses
Provide a basis for setting piece prices or incentive wages
Determine standard costs
Determine the capability of an operator to handle the number of machines
In breakeven analysis, total cost consists of
Fixed cost
Variable cost
Fixed cost + variable cost
Fixed cost + variable cost + overheads
Gantt charts are used for
Forecasting sales
Production schedule
Scheduling and routing
Linear programming
The essential condition for the decompression of an activity is that
The project time should change due to decompression
After decompression the time of an activity invariably exceeds its normal time
An activity could be decompressed to the maximum extent of its normal time
None of the above
Time study is carried out
By finding all the significant informations regarding the job, work place and machine tool etc.
By breaking up each operation into small elements which are measurable with the help of the measuring device accurately
By observing and recording the time taken by the operator for an operation
All of the above
In order that linear programming techniques provide valid results
Relations between factors must be linear (positive)
Relations between factors must be linear (negative)
Either (A) or (B)
Only one factor should change at a time, others remaining constant
The main disadvantage of line organisation is
Top level executives have to do excessive work
Structure is rigid
Communication delays occur
All of the above
Inventory control in production, planning and control aims at
Achieving optimisation
Ensuring against market fluctuations
Acceptable customer service at low capital investment in inventory
Discounts allowed in bulk purchase
The factors to be considered for production scheduling are
Component design
Route sheet
Time standards
All of these
P.M.T.S. (Predetermined Motion Time Systems) include
M.T.M. (Method Time Measurement)
W.F.S. (Work Factor Systems)
B.M.T.S. (Basic Motion Time Study)
All of these
Scheduling gives information about
When work should start and how much work should be completed during a certain period
When work should complete
That how idle time can be minimized
Proper utilisation of machines
The product layout
Lowers overall manufacturing time
Requires less space for placing machines
Utilises machine and labour better
All of these