In an organization each part or product is to be manufactured to a deadline and with high degree of quality and accuracy. To successfully run an production organization the work in assembly or production lines is needed to be balanced to be produced in desired time.
LINE BALANCING
Line balancing means to distribute the work content to balance the cycle time to the rate of customer demand.
There are some line balancing parameters required to aid in line balancing.
- Takt Time Equation
- Line balance ratio (L.B.R)
- Line arrangement efficiency (L.A.E.)
- Optimum manpower equation.
Once the takt time is calculated by using the customer demand, time study of various process is needed to be done and the time required for various processes is needed to be noted down.
When you have the details of time required for various processes and the takt time then a graph can be made to visually represent the findings.
Consider the following time operation graph:-
Once the graph is plotted you can calculate the following parameters:-
LINE BALANCE RATIO:
LINE ARRANGEMENT EFFICIENCY:
OPTIMUM MANPOWER:
*Note:- For LINE BALANCE RATIO & LINE ARRANGEMENT EFFICIENCY the ideal case value is 100%.
Now, from the results obtained we can balance the works so as to keep the cycle time of each process under the takt time .
Once the adjustments are made the Line balance ratio and Line arrangement efficiency can be recalculated to measure the benefits of the adjustments made.
*Note:- It may take multiple attempts to balance a line practically so don't get dishearten if you did't achieve optimum results in one or two times.
CONSIDERING THE FOLLOWING EXAMPLE WILL RE-CLEAR YOUR CONCEPTS:-
*Notes:-
- L.A.E. depends on manpower i.e. it will only change if number of operators are altered during adjustments.
- L.A.E. will reach 100 % when sum of times of all process is equal to the product of takt time and number of operators.
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