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OSCM 373 Final questions with 100% correct answers
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OSCM 373 Final questions with 100% correct answers
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OSCM 373 FinalLean Operations address... - correct answer ✔✔eliminating waste
- things related to time and space
remove variability
-inventory hides variability
increase throughput
Short-term scheduling - correct answer ✔✔allocate and prioritize resources to meet demand
days, hours, minutes
if effective, gives competitive advantage
forward vs backward scheduling - correct answer ✔✔Forward:
starts as soon as requirements are known
may not meet due dates
-frequently customers must wait for service
Backward:
starts with due date
resources may not be available, not good schedule
Finite vs Infinite loading - correct answer ✔✔Goal: assign jobs to work stations
,Finite
-assign up to the capacity of work station
-all work gets done, due dates may be pushed out
Infinite
-does not consider capacity
-ALL due dates are met
input/output control - correct answer ✔✔Form of loading(assigning efficient jobs)
identifies overloading and underloading conditions
managerial assistance needed
operations personnel can change input, capacity, and performances
Gantt Charts - correct answer ✔✔planning charts used to schedule resources and allocate time
Gantt Scheduling chart
-monitors jobs in process
Gantt Loading chart
-shows idle time, machines, departments
HAVE to be updated frequently to account for change
Assignment Method - correct answer ✔✔A model to assign tasks or jobs to resources
only one job or worker is assigned to one machine
, objective is to minimize cost or time
Sequencing Jobs (types) - correct answer ✔✔FCFS : first come, first serve
SPT: shortest process time
EDD: earliest due date
LPT: longest processing time
Critical ratio - correct answer ✔✔Time remaining until due date divided by work remaining to be done.
helps determine status of specific jobs
CR < 1 ----job is late
CR= 1 --- job is on time
CR > 1 --- job has slack
helps establish priorities for jobs
Johnson's Rule - correct answer ✔✔an approach that minimizes the total time for sequencing a group of
jobs through two work centers.... minimizing total idle time in the work centers
-two or more jobs that pass through same two workcenters and same sequence
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