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Lean Construction
Muhammad Abdullah Alvi
Primavera Workshop
UNIVERSITY OF ENGINEERING AND TECHNOLOGY TAXILA
PAKISTAN
What do we mean by LEAN and
CONSTRUCTION ????????
LEAN….
Systematic Method for the Elimination of Wastes
Construction…. Construction means to build anything. There are many type of
constructions like
Buildings Construction
Bridges Construction
Railways Construction
Dams/Barrages Construction
Roads Construction
What do we mean by CONSTRUCTION
PROJECT ????????
Characterization of Construction IndustryDifferent Construction Categories
Different Workplace/Workstations
Nature of Sites (Multi-employer/Environment)
Physical Work
Special Trades
Teamwork
Construction Project PhasesThere are 4 distinct phases of
Construction Projects
Conceive•Owners Need Statement.•Establishment of General Requirements.•Feasibility and Impact Study.•Conceptual Design.
Develop•Preliminary Design.•Detailed Design.
Construction Project Phases….
Execute• Assign
Construction Team.
• Procurement.• Onsite Planning.• Construction.• Commissioning.
Finish• Commissioning.
• Training.
Construction Management….
Construction Management is defined as the judicious allocation of resources to finish a project on time, at budget, and at desired quality…
COST
QUALITYTIME
A long running joke in the industry has been that you can only get two out of these three attributes
What do we mean by LEAN CONSTRUCTION ???????
?
LEAN CONSTRUCTION…. Schematic reduction in wastes during the Construction of a Project
is known as Lean Construction.
Project Management~ Process of Controlling “Main Sail and Rudder.Production Management~ Trimming the Front Jib Sail and Balancing the Boat.
LEAN CONSTRUCTION= Project Management + Production Management
CONSTRUCTION WASTES….
Correction/Re-work Performing work out of
sequence Waiting for design comments Inefficient construction
methods Marshalling of materials on-site
Redundant design/construction processes
Lack of “JIT” construction practices Inefficient teamwork/communication Slowdown/stoppage in work processes
There are different types of Construction Wastes. In Construction Management these wastes are known as CURT.
TIME
TIMEWASTED TIME IS OUT OF CONTROL !!!!!
WASTED TIME…
PRODUCTIVE TIME….
47%57%
CONSTRUCTION
Productive Time Waste
LEAN CONSTRUCTION….
Refined Definition…. “A way to design production systems to minimize waste of materials,
time, and effort in order to generate the maximum possible amount of value."
Common Practice• Project Planning and Controlling is done…
What Needed is!!• Production Planning and Controlling…
PROCESS….
Reduces Waste Saves Money and Reduces Cost Creates Higher Quality Creates Flexible Delivery
Systems to Match Owner Requirements
Creates Stable Schedules Reliable Material Deliveries and Reliable
Workforce Promotes Employee Participation, Which
Leads to Satisfaction Improves Customer Satisfaction Requires a Cultural Change
It is a process in which a Manager tries to achieve the following milestones.
Why
Before searching for the answer of the aforementioned Question…. It is necessary to understand following terms.
LEAN CONSTRUCTION is Required???WASTE
• Waste is usually what reduces VALUE VALUE
• Value for the CLIENT is produced by their assessment of the deliverable when it is delivered.
Trade-off• A trade-off is a situation that
involves losing one quality or aspect of something in return for gaining another quality or aspect.
LEAN CONSTRUCTION allows you to arrive at all your Goals without a Trade-off.
There can be following types of Trade-off. Time Safety Quality Cost Sustainability Participant Satisfaction
Cont….
LEAN CONSTRUCTION TECHNIQUES…. Work is structured throughout the process to maximize value and to
reduce waste-at the project delivery level. The facility and its delivery process are designed together to better
reveal and support customer purposes. Efforts to manage and improve performance are aimed at improving
total project performance, because this is more important than reducing the cost or increasing the speed of any particular activity.
"Control" is redefined from "monitoring results" to "making things happen." The performance of the planning and control systems are measured and improved.
Cont….
Lean Design and Construction is particularly useful on complex, uncertain and quick projects.
It challenges the belief that there must always be trade-offs between time, cost, and quality.
AFTER LEAN CONSTRUCTION
QUESTIONS???
THANK YOU FOR YOUR ATTENTION!
KEEP SMILING