Operation

Only available on StudyMode
  • Download(s) : 101
  • Published : December 5, 2012
Open Document
Text Preview
04/11/2012

Outline
 What is planning and control?
 What are the planning and control
activities?
 Resource planning and control.

NBS-2P2Y Operations Strategy & Mgt

2

1

04/11/2012

What is planning and control?
what activities should take place in the
operation

Planning is deciding

when they should take place
what resources should be allocated to them

understanding what is actually happening in the
operation

Control is

deciding whether there is a significant deviation
from what should be happening
(if there is deviation) changing resources in order
to affect the operation’s activities.

NBS-2P2Y Operations Strategy & Mgt

3

Long-term planning and control
Uses aggregated demand forecasts
Determines resources in aggregated form

Days/weeks/months

PLANNING

Objectives set in largely financial terms

Medium-term planning and control
Uses partially disaggregated demand forecasts
Determines resources and contingencies
Objectives set in both financial and operations
terms

Short-term planning and control
Hours/days

Time horizon

Months/years

What is planning and control?

CONTROL

Uses totally disaggregated forecasts or actual
demand
Makes interventions to resources to correct
deviations from plans
Ad hoc consideration of operations objectives.

NBS-2P2Y Operations Strategy & Mgt

4

2

04/11/2012

Planning and control activities
How much
to do?

When to
do things?

Scheduling

Sequencing

Loading

Monitoring
and control

In what
order to do
things?

Are activities
going to plan?

NBS-2P2Y Operations Strategy & Mgt

5

Scheduling
 Forward scheduling
 Backward scheduling
 Mass process-type: Line balancing
 Batch process-type: Material requirements planning
 Jobbing process-type: Project management techniques

NBS-2P2Y Operations Strategy & Mgt

6

3

04/11/2012

Loading
 Finite loading - allocates work up to a set capacity
limit. This will either involve some kind of demand
management (i.e. an appointments system) or
physical restriction on demand (i.e. an aircraft
baggage allowance).
 Infinite loading - is essentially a strategy to cope with any level (within limits) of demand. No demand
restrictions are set because it may not be possible (i.e.
an accident and emergency department) or the
operation may be designed to cope with such flexible
requirements.

NBS-2P2Y Operations Strategy & Mgt

7

(a) Finite loading (b) Infinite loading
NBS-2P2Y Operations Strategy & Mgt

8

4

04/11/2012

Sequencing
 Physical constrains
 Customer priority
 Due date
 Last-in first-out
 First-in first-out
 Longest operation time
 Shortest operation time

NBS-2P2Y Operations Strategy & Mgt

9

Monitoring and control

NBS-2P2Y Operations Strategy & Mgt

10

5

04/11/2012

A control loop
Start.

Take action to correct performance

Set standards (or
targets, objectives,
etc)

Revise the standards
Continue unchanged if corrective
action is not needed
Compare performance
standards and decide
whether corrective
action is needed

Measure Performance

NBS-2P2Y Operations Strategy & Mgt

11

Steady state control
Corrective action needed

Upper Limit

Changes in System Performance
Lower Limit
Corrective action needed

NBS-2P2Y Operations Strategy & Mgt

12

6

04/11/2012

Push control
FORECAST

CENTRAL OPERATIONS, PLANNING AND CONTROL SYSTEM

OR

Instruction on
what to make
and where to
send it

Work
centre

Work
centre

Work
centre

DEMAND

Work
centre

NBS-2P2Y Operations Strategy & Mgt

13

Pull control

Work
centre

Work
centre
Delivery

Work
centre
Delivery

Request

Request

Request

Request

Work
centre
Delivery

NBS-2P2Y Operations Strategy & Mgt

DEMAND
Delivery

14

7

04/11/2012

NBS-2P2Y Operations Strategy & Mgt

15

The drum, buffer, rope...
tracking img