Go home Go to lean transformation
“Unless commitments are
implemented, there are only promises and hopes, but no plans” Peter Drucker
LastPlanner © was developed at the end of nineties by Ballard
and Howell, founders of the Lean Construction Institute. You can view the PhD about this topic by
Ballard in this link.
Its about planning
project tasks collaboratively. Subcontractors and engineers must promise to
deliver some quantities or tasks weekly. The best way to understand how it
works is with a picture. Go to this link.
There are two options: with the help of software
(primavera, project, etc.) or without. You choose your best option according to
your project. This LinkedIn discussion is very interesting about this issue.
There is a weekly meeting to review the tasks
done, and next you plan the week ahead. PPC (Percentage of Plan Completed) is
the relation between quantities made and quantities planned. This ratio will
improve according to the progress of the project. See the graphic below by Dr.
Tariq Abdelhamid of Michigan University.
© Luis Alarcón, www.leanconstruction.org
A useful control tool is putting the reasons
for non-compliance in a bar chart: poor coordination, no materials, change
orders, low performance, mistakes, unclear information, execution method, etc.
According to Ken
the four main reasons for non-compliance are: poor coordination, engineering,
change orders and weather.
Advantages of Last Planner:
1. It´s a driver towards improve communication
and teamworking among subcontractors
3. Involvement of the workers: planning is the
result of the effort of everyone
4. Fulfills the lead time of the project
6. It´s a driver towards kaizen attitude
8. Supply Chain is decided by consensus
9. Every subcontractor has a responsibility in
the presence of others
10. Agreements among subcontractors involve
less work for foremen
Last Planner System is based on promises.
Subcontractors should only ensure what is possible and they´ll make an effort
to fulfill it. According to Formoso (2006), the success of LPS depends on how
we manage the commitments.
It´s also useful in the design phase and can be
used by architects and engineers. In
summary, it´s a tool to designate weekly goals to a team.
Nowadays, Last Planner System has spread around
the world and there are many cases studies: Norway, Korea, Denmark, the USA,
the UK, Colombia, Chile, Brazil, Saudi Arabia, Germany, Australia, Spain, etc.
You can find the papers in the annual world meetings of the International Group
of Lean Construction.
It´s interesting to consult this paper presented
in Haifas (2010) about two methodologies for planning projects: Last Planner
System and Critical Chain Project Management. There is also a comment about
Flow-Line in the conclusion section.