Hoofdstuk 15

Question 1

The key principle of lean operations is
relatively straightforward to understand,
it means

Answer 1

moving towards the elimination 
of all waste in order to develop an 
operation that is faster, more 
dependable, produces higher quality 
products and services and, above all, 
operates at low cost’.

Question 2

3 pilaren van lean bedrijfsfilosofie

Answer 2

Continious improvement
Involve everyone
Minimalize waste

Question 3

Muda

Answer 3

Activiteiten in een proces die verspillend zijn omdat ze geen waarde toevoegen

Question 4

Mura

Answer 4

ongelijkmatigheid die reulteert in periodieke overbelasting van personeel of apparatuur

Question 5

Muri

Answer 5

betekent absurd of onredelijk eisen die aan een proces worden gesteld, tot slechte resultaten zullen leiden.

Question 6

7 types of waste

Answer 6

• Over-production
• Waiting time
• Transport
• Process
• Inventory
• Motion
• Defectives

Question 7

Eliminating Waste: Improved Process Flow

Answer 7

Throughput time is often seen as a way to 
measure waste in processes.
The process can be analyzed to see if a 
item is being moved, stored, checked or 
involved in non value adding activities.
One tool use for this is called 
Value Stream Mapping

Question 8

Eliminating Waste: matching supply and demand

Answer 8

Delivering goods or services either too late
or too early can cause waste.
A pull system can often be a good way to
match demand and supply

Question 9

Eliminating Waste: flexible processes

Answer 9

Flexibiliteit als 1 van key Performance Objectives
• In praktijk vaak focus op reductie omsteltijden (SMED):
Inzichtelijk maken omstelproces
Onderscheid interne & externe activiteiten
Omzetten interne naar externe activiteiten
Oefenen, oefenen, oefenen…….

Question 10

Minimize variability

Answer 10

• Levelled scheduling equalizes the mix
  of products made each day
• Delivering smaller quantities more often can reduce
  inventory levels

Question 11

5S-terminologie

Answer 11

1. Sorteren (seiri). elimineer wat niet nodig is en bewaar wat nodig is
2. Rechtzetten (Seiton) dingen makkelijk bereikbaar maken
3. Schitteren (seiso) houd alles schoon en opgeruimd
4. Standaardiseren (seiketsu) netheid en orde handhaven
5. Volhouden (shitsuke) ontwikkel een verbintenis en een trots om aan de normen te voldoen

Question 12

Grenzen van lean

Answer 12

Continuous flow manufacture
High value-added manufacture
Stockless production
Low-inventory production
Fast-throughput manufacturing
Lean manufacturing
Toyota production system!!!
Short-cycle time manufacturing.

Question 13

Theory of constraints

Answer 13

Achieve improvement by:
 Focusing on the constraints in the form of the weakest
links in the process
 Applied in Optimized Production Technology OPT
systems, using the drum, buffer, rope approach

Question 14

Lean

Answer 14

• Pull system – responding to demand
• A philosophy and culture
• Good on control but weak on planning due to reactive
“pull” approach

Question 15

Manufacturing Resource Planning (MRP)

Answer 15

• Push system - using forecasts of future demand to
calculate planning
• A planning and control calculating mechanism
• Strong on planning but weak on control and responding to
disturbances
• Good at dealing with complexity