This document discusses Lean manufacturing. It defines Lean as a systematic approach to eliminating waste so that every step adds value for the customer. The principles of Lean are defining value from the customer perspective, identifying the value stream, making the process flow, pulling from the customer, and seeking perfection. The goals of Lean are to improve quality, eliminate waste, and reduce time and total cost. There are seven forms of waste: overproduction, waiting, transport, extra processing, inventory, motion, and defects. Lean tools for continuous improvement include waste elimination, standardized work, poka yoke, 5S visual workplace, just-in-time, continuous improvement, material management, and work in process. Steps to achieve Lean systems are to

1. LEAN
MANUFACTURING
ST. VINCENT PALLOTTI COLLEGE OF ENGINEERING
& TECHOLOGY
DEPARTMENT OF MECHANICAL ENGINEERING

2. Content
What is lean?
 Why lean?
 Principles of lean
 Goals of lean
 Types of waste
 Lean tools
 Steps to achieve lean systems

3. What is lean ?
Lean is a systematic
approach of eliminating
waste so every step adds
value for the Customer

4. Myths and misconception
• It is Japanese philosophy
• Only apply to manufacturing
• Busting union and get rid of people
• Magical pill to cure all business and industrial problem

5. Principles of lean
• Define value from the customer
perspective
• Identify the value stream
• Make the process flow
• Pull from the customer
• Head toward perfection
identify
value
stream
Create flow
Make as per
customer
ordered
Seek
perfection
Specific
value

6. Goals of lean
Improve quality
Eliminate waste
Reduce time
Reduce total cost
Reducing the time it takes to finish an activity
from start to finish is one of the most effective
ways to eliminate waste and lower costs.
To minimize cost, a company must produce
only to customer demand. Overproduction
increases a company’s inventory costs due to
storage needs.
In order to stay competitive in today’s
marketplace, a company must understand its
customers' wants and needs and design
processes to meet their expectations and
requirements.
Waste is any activity that consumes time,
resources, or space but does not add any
value to the product or service.

7. Waste ?
• Waste is any activity
that consumes time,
resources, or space but
does not add any value
to the product or
service.
Muda no value added to product
Mura lack of consistency
Muriunreasonable demand for resources

8. The seven forms of waste
• overproduction (occurs when production should have stopped)
• Waiting (periods of inactivity)
• Transport (unnecessary movement of materials)
• Extra Processing (rework and reprocessing)
• Inventory (excess inventory not directly required for current orders)
• Motion (extra steps taken by employees due to inefficient layout)
• Defects (do not conform to specifications or expectations)

9. Lean tools for continuous improvement
• WASTE ELIMINATION
• STANDARDIZED WORK
• POKA YOKE
• 5S VISUAL WORKPLACE
• JUST IN TIME
• CONTINUOUS IMPROVEMENT
• MATERIAL MANAGEMENT
• WORK IN PROCESS

11. Steps to achieve lean
systems
• The following steps should be implemented in order to create
the ideal lean manufacturing system:
• Design a simple manufacturing system
• Recognize that there is always room for improvement
• Continuously improve the lean manufacturing system design