The document summarizes key concepts related to line balancing problems in manufacturing. It defines terms like minimum work element, total work content, workstation process time, cycle time, and precedence constraints that are important to consider when balancing a production line. It also describes the largest candidate rule method for assigning work elements to stations in a way that aims to balance station times and meet production rate requirements while respecting precedence constraints.

1. Career Point Cares
CAREER POINT UNIVERSITY
MAJOR ASSIGNMENT
TOPIC: Line Balancing
Submitted By :-
Mr. Wakil Kumar
UID : K12467
Course: B.Tech, 1st
year/
2nd
sem
Branch: CSE
Submitted To :-
Prof. Amardeep Kumar
Subject : Manufacturing (MEL120)

2. Career Point Cares
Contents
• The Line Balancing Problem
• Things to consider
• Terminology and Definitions
• Minimum Work Element
• Total Work Content
• Workstation Process time
• Cycle time
• Precedence Constraints
• Balance Delay
• Method – Largest Candidate Rule

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The Line Balancing Problem
• The problem is to arrange the individual
processing and assembly tasks at the
workstations so that the total time required at
each workstation is approximately the same.
• Nearly impossible to reach perfect balance

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Things to consider
• Sequence of tasks is restricted, there is a
required order
• Called precedence constraints
• There is a production rate needed, i.e. how
many products needed per time period
• Design the line to meet demand and within
constraints

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Minimum Work Element
• Dividing the job into tasks of a rational
and smallest size
• Example: Drill a hole, can’t be divided
• Symbol – Time for element j:
• is a constant
ejT
ejT

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Total Work Content
• Aggregate of work
elements
∑=
=
n
j
ejwc TT
1

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Workstation Process time
• The amount of time for an individual
workstation, after individual tasks have been
combined into stations
• Sum of task times = sum of workstation times

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Cycle time
• Time between parts coming off the line
• Ideally, the production rate, but may need to
be adjusted for efficiency and down time
• Established by the bottleneck station, that is
station with largest time

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Precedence Constraints
• Generally given, determined by the required
order of operations
• Draw in a network style for understanding
• Cannot violate these, an element must be
complete before the next one is started

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Balance Delay
• Measure of line
inefficiency due to
imbalances in
station times
c
wcc
nT
TnT
d
−
=

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Method – Largest Candidate Rule
• List elements in descending order of T
• Assign elements to first station, from top to
bottom of list, minding constraints, and not
causing sum to exceed cycle time
• Continue assigning elements to stations
where each station < cycle time, largest
assigned first, until all assigned
• EXAMPLE

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THANK YOU…