Master Scheduling

KMP 5903 Manufacturing Operation Management

Dr. Faieza Abdul Aziz

Group 71) Mohd Nasrull B. Abd Rahman (GS21504)

2) Edwin Chan (GS21416)

Weekly Presentation

Master Scheduling

KMP 5903 Manufacturing Operation

Management



Content• Scheduling• Master Scheduling• Axapta's Master Planning Software• Master Schedule Types• Scheduling Manufacturing Operations• High-Volume Systems• Gantt Load Chart• Loading• Sequencing• Scheduling Difficulties• Scheduling Service Operations• Cyclical Scheduling• Service Operation Problems• Scheduling Workload United Airlines (Video)• New process implementation, conversion schedule McDonald s (Video)



• Scheduling: Establishing the timing of the use of equipment, facilities and human activities in an organization

• Effective scheduling can yield

– Cost savings

– Increases in productivity

Scheduling



Master Scheduling

• Master scheduling is used for:– demand management– scheduling production– validating the production schedule– managing the production schedule

• The schedules generated by master scheduling as input to other manufacturing functions, such as material requirements planning and rough-cut capacity planning.



Axapta's Master Planning Software

Master scheduling helps to calculate what needs

a) to be purchased and produced to fill a sales order:

b) to deliver the amount ordered on the date scheduled, and to generate transfers between warehouses if needed.



Master Schedule Types

Master Demand Schedule (MDS)• The MDS is a statement of demand and contains details of

the anticipated shipment schedule• The master demand schedule provides an extra level of

control that allows to view and modify statement of demand before creating a detailed production schedule.

• Some of the demand types that the MDS considers are:– item forecasts– spares demand– sales orders– internal requisitions



Master Production Schedule (MPS)• The MPS is a statement of supply required to meet the

demand for the items contained in the MDS. • The master production schedule defines the anticipated

build schedule for critical items. • An effective master production schedule provides the

basis for order promising and links the aggregate production plan to manufacturing by specific items, dates, and quantities.

Master Schedule Types



An example of a (very) simplified Master Production Schedule for

'Product A'.



Scheduling Manufacturing Operations

High-volume

Intermediate-volume

Low-volume

Service operations

Build A

A Done

Build B

B Done

Build C

C Done

Build D

Ship

JAN FEB MAR APR MAY JUN

On time!



High-Volume Systems

• Flow system: High-volume system with Standardized equipment and activities

• Flow-shop scheduling: Scheduling for high-volume flow system

Work Center #1 Work Center #2 Output



High-Volume Success Factors

• Process and product design

• Preventive maintenance

• Rapid repair when breakdown occurs

• Optimal product mixes

• Minimization of quality problems

• Reliability and timing of supplies



Scheduling Low-Volume Systems

• Loading - assignment of jobs to process centers

• Sequencing - determining the order in which jobs will be processed

• Job-shop scheduling– Scheduling for low-volume

systems with many variations in requirements



Gantt Load Chart• Gantt chart - used as a visual aid for

loading and scheduling

WorkCenter

Mon. Tues. Wed. Thurs. Fri.

1 Job 3 Job 42 Job 3 Job 73 Job 1 Job 6 Job 74 Job 10



Loading• Infinite loading

• Finite loading

• Vertical loading

• Horizontal loading

• Forward scheduling

• Backward scheduling

• Schedule chart



Sequencing• Sequencing: Determine the order in which

jobs at a work center will be processed.

• Workstation: An area where one person works, usually with special equipment, on a specialized job.



Sequencing• Priority rules: Simple heuristics

used to select the order in which jobs will be processed.

• Job time: Time needed for setup and processing of a job.



Scheduling Difficulties

• Variability in– Setup times– Processing times– Interruptions– Changes in the set of jobs

• No method for identifying optimal schedule

• Scheduling is not an exact science

• Ongoing task for a manager



Minimizing Scheduling Difficulties

• Set realistic due dates

• Focus on bottleneck operations

• Consider lot splitting of large jobs



Scheduling Service Operations

• Appointment systems– Controls customer arrivals for service

• Reservation systems– Estimates demand for service

• Scheduling the workforce– Manages capacity for service

• Scheduling multiple resources– Coordinates use of more than one resource



Service Operation Problems

• Cannot store or inventory services

• Customer service requests are random

• Scheduling service involves– Customers– Workforce– Equipment



Scheduling Workload United Airlines



References

1) Book of Operations Management, William J. Stevenson 8th edition

2) http://www.mbsadvisor.com/axapta/masterscheduling.htm

3) http://www.mcts.com/Master-Scheduling.html

4) http://www.realtimesw.com/manufacturing/master_scheduling.htm

5) http://www.master-scheduling.com/

Master Scheduling

Documents

Transcript of Master Scheduling