The book tells the story of Alex Rogo, a plant manager at UniCo who realizes that his factory is facing difficulties. Due to weak performance Alex’s boss Bill Peach gave three months to make the plant profitable otherwise he will shut the plant.
To solve the problem Alex takes
help from Jonah. Based on Jonah’s guidance Alex gathered his team and found
that the Goal of any company is to make more money rather than efficiency.
Anything that brings him closer to the Goal is productive. And all other
activities are non-productive. To achieve the goal they need to increase cash
flow, ROI, and the net profits.
Jonah gave him three operational
measurements - Throughput, Inventory and Operational expense. Throughput is
cash coming in. Inventory is the cash at present inside the framework.
Operational cost is the cash we need to pay out to get throughput going.
During the next meeting Jonah
discloses the Theory of Constraints. Constraint is a factor that prevents the system
from achieving the Goal. Constraints define the overall performance of the
system. In the manufacturing plan bottleneck is the most important aspect to
analyse performance of the plant. A bottleneck is any resource with lower
capacity than the current demand. During more than one bottlenecks are present
in the same line of flow, the one with the least capacity is the constraint.
The only way to increase production is increase the capacity at the bottleneck
operations.
After some work they found bottlenecks-
NCX10 and heat treatment. Jonah explains that each minute of loss at a
bottleneck results in lost throughput for the entire plant. So team decides to
keep the bottlenecks fully utilized. To take care of problems occurring during
the process of improvement Alex’s team takes some counter measures like keeping
inventory and quality check before bottleneck and reduced the batch size.
Despite many challenges they succeed to make the plan profitable and also break
the record of previous sales. And Peach promoted Alex as head of the division
to manage three plants instead of just one.
After Alex’s core team promoted
to their new positions, they formulate a Five-step Process Of On-Going
Improvement:
One - Identify the Constraint
Effective technique for that is a
simple walk through manufacturing process. By reviewing equipment performance
data, average cycle time and Inventory we can find out constraints.
Two - Exploit the Constraint
The output of the constraint
restricts the output of the system as a whole. So it is important to maximize
the utilization and productivity of the constraint. Some actions like, Create
an inventory buffer in front of the constraint, Check quality immediately
before the constraint, constraint capacity is continuously scheduled for
running, can help for that.
Three – Subordinate every other constrain
The primary objective of
non-constrain is to support the need of constraint. It is necessary to avoid it
to produce more than the constraint can handle. So proper utilization of
Upstream and Downstream equipment is needed.
Four – Elevate the Constraint’s performance
Once the capacity of constraint
is 100% utilized, it needs to be expanded by investing in additional
machineries/land, labour. Without implementing 3rd step investing too soon
raises risk unnecessarily because there is always hidden capacity available.
Five – Repeat the Process and go back to the beginning
If the current constraint has
been broken, then look for a new constraint and repeat the process from step
one.
By means of this book dr.
Goldratt explains business fundamentals give a new approach to solve a problem.
Application of TOC in my life: