This document provides an introduction to linear programming. It defines linear programming as a mathematical modeling technique used to optimize resource allocation. The key requirements are a well-defined objective function, constraints on available resources, and alternative courses of action represented by decision variables. The assumptions of linear programming include proportionality, additivity, continuity, certainty, and finite choices. Formulating a problem as a linear program involves defining the objective function and constraints mathematically. Graphical and analytical solutions can then be used to find the optimal solution. Linear programming has many applications in fields like industrial production, transportation, and facility location.
Linear programming
Application Of Linear Programming
Advantages Of L.P.
Limitation Of L.P.
Slack variables
Surplus variables
Artificial variables
Duality
A problem is provided which is solved by using graphical and analytical method of linear programming method and then it is solved by using geometrical concept and algebraic concept of simplex method.
Linear programming
Application Of Linear Programming
Advantages Of L.P.
Limitation Of L.P.
Slack variables
Surplus variables
Artificial variables
Duality
A problem is provided which is solved by using graphical and analytical method of linear programming method and then it is solved by using geometrical concept and algebraic concept of simplex method.
This presentation is trying to explain the Linear Programming in operations research. There is a software called "Gipels" available on the internet which easily solves the LPP Problems along with the transportation problems. This presentation is co-developed with Sankeerth P & Aakansha Bajpai.
By:-
Aniruddh Tiwari
Linkedin :- http://in.linkedin.com/in/aniruddhtiwari
For a good business plan creative thinking is important. A business plan is very important and strategic tool for entrepreneurs. A good business plan not only helps entrepreneurs focus on specific steps necessary for them to make business ideas succeed, but it also helps them to achieve short-term and long-term objectives. As an inspiring entrepreneur who is looking towards starting a business, one of the businesses you can successfully start without much stress is book servicing café.
Importance:
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The online book servicing café’s main users are divided into two categories, one is the front user, and one is the background user. The main business model for Book Servicing Café relies on college students providing textbooks, auctions, classifieds teacher evaluations available on website. Therefore, our focus will be on the marketing strategy to increase student traffic and usage. In turn, visitor volume and transactions will maintain the inventory of products and services offered.
Online bookstore system i.e. Book Servicing Café not only can easily find the information and purchase books, and the operating conditions are simple, user-friendly, to a large extent to solve real-life problems in the purchase of the books.
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While purchasing or selling books at the book servicing café, you save money, energy and time for your favorite book online. The book servicing café will offer discount coupons which help college students save money or make money on their purchases or selling. Shopping for books online is economical too because of the low shipping price.
Book servicing café tend to work with multiple suppliers, which allows them to offer a wider variety of books than a traditional retail store without accruing a large, costly inventory which will help colle
This presentation is trying to explain the Linear Programming in operations research. There is a software called "Gipels" available on the internet which easily solves the LPP Problems along with the transportation problems. This presentation is co-developed with Sankeerth P & Aakansha Bajpai.
By:-
Aniruddh Tiwari
Linkedin :- http://in.linkedin.com/in/aniruddhtiwari
For a good business plan creative thinking is important. A business plan is very important and strategic tool for entrepreneurs. A good business plan not only helps entrepreneurs focus on specific steps necessary for them to make business ideas succeed, but it also helps them to achieve short-term and long-term objectives. As an inspiring entrepreneur who is looking towards starting a business, one of the businesses you can successfully start without much stress is book servicing café.
Importance:
Nowadays, network plays an important role in people’s life. In the process of the improvement of the people’s living standard, people’s demand of the life’s quality and efficiency is more higher, the traditional bookstore’s inconvenience gradually emerge, and the online book store has gradually be used in public. The online book store system based on the principle of providing convenience and service to people.
With the online book servicing café, college student do not need to blindly go to various places to find their own books, but only in a computer connected to the internet log on online book servicing café in the search box, type u want to find of the book information retrieval, you can efficiently know whether a site has its own books, if you can online direct purchase, if not u can change the home book store to continue to search or provide advice to the seller in order to supply. This greatly facilitates every college student saving time.
The online book servicing café’s main users are divided into two categories, one is the front user, and one is the background user. The main business model for Book Servicing Café relies on college students providing textbooks, auctions, classifieds teacher evaluations available on website. Therefore, our focus will be on the marketing strategy to increase student traffic and usage. In turn, visitor volume and transactions will maintain the inventory of products and services offered.
Online bookstore system i.e. Book Servicing Café not only can easily find the information and purchase books, and the operating conditions are simple, user-friendly, to a large extent to solve real-life problems in the purchase of the books.
When you shop in online book servicing cafe, you have the chance of accessing and going through customers who have shopped at book servicing café and review about the book you intend to buy. This will give you beforehand information about that book.
While purchasing or selling books at the book servicing café, you save money, energy and time for your favorite book online. The book servicing café will offer discount coupons which help college students save money or make money on their purchases or selling. Shopping for books online is economical too because of the low shipping price.
Book servicing café tend to work with multiple suppliers, which allows them to offer a wider variety of books than a traditional retail store without accruing a large, costly inventory which will help colle
A brief study on linear programming solving methodsMayurjyotiNeog
This small presentation includes a brief study on various linear programming solving methods. These methods (graphical & simplex) are used to solve industrial engineering related problems in practical use.
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2. INTRODUCTION
LINEAR PROGRAMMING
• Linear programming uses a mathematical model to describe the problem of concern.
• The word linear means the relationship which can be represented by a straight line .i.e the relation is of the form
• ax +by=c. In other words it is used to describe the relationship between two or more variables which are proportional to each other.
The word "programming" is concerned with the optimal allocation of limited resources. Linear programming is a way to handle certain
types of optimization problems Linear programming is a mathematical method for determining a way to achieve the best outcome.
Linear programing planning
• A mathematical technique used to obtain an optimum solution in resource allocation problems, such as production planning.
• It is a mathematical model or technique for efficient and effective utilization of limited recourses to achieve organization objectives
(Maximize profits or Minimize cost).
• When solving a problem using linear programming the program is put into a number of linear inequalities and then an attempt is made
to maximize (or minimize) the inputs.
REQUIREMENTS
• There must be well defined objective function.
• There must be a constraint on the amount.
• There must be alternative course of action.
• The decision variables should be interrelated and non negative.
• The resource must be limited in supply.
ASSUMPTIONS
Proportionality
Additivity
Continuity
Certainty
Finite Choices
3. Formulation as a Linear Programming Problem
Let,
• The objective is to choose the values of x1 and x2 so as
to maximize,
subject to the restrictions imposed on their values by the
limited production capacities available in the three plants.
• Table 3.1 indicates that each batch of product 1
produced per week uses 1 hour of production time per
week in Plant 1, whereas only 4 hours per week are
available. This restriction is expressed mathematically
by the inequality
Similarly,
• Plant 2 imposes the restriction that
The number of hours of production
4. • Time used per week in Plant 3 by choosing x1 and x2 as the new products’ production rates would be
. Therefore, the mathematical statement of the Plant 3 restriction is
• Finally, since production rates cannot be negative, it is necessary to restrict the decision variables to
be non-negative:
• To summarize, in the mathematical language of linear programming, the problem is to choose
values of x1 and x2 so as to
Graphical Solution
The final step is to pick out the point in
this feasible region that maximizes the
value of Z = 3x1 + 5x2.
5. To discover how to perform this step efficiently, begin by trial and error. Try,
• for example, Z =10 = 3x1 + 5x2 to see if there are in the permissible region
any values of (x1, x2) that yield a value of Z as large as 10.
• next try a larger arbitrary value of Z, say, Z =20 = 3x1 + 5x2 . Again
This last equation, called the slope-intercept form
The value of (x1, x2) that
maximizes 3x1 + 5x2 is (2, 6).
Indicating that the optimal solution
is x1 = 2 and x2 = 6. The equation of this line is 3x1 + 5x2
= 3(2) + 5(6) = 36 = Z, indicating that the optimal value of Z
is Z = 36
6. The linear programming MODEL
• The model poses the problem in terms of making decisions about the levels
of the activities, so x1, x2, . . . , xn are called the Decision variables.
A Standard Form of the Model
Z = value of overall measure of performance.
xj = level of activity j (for j = 1, 2, . . . , n).
cj = increase in Z that would result from each unit increase in level of activity j.
bi = amount of resource i that is available for allocation to activities
(for i = 1, 2, . . . , m).
aij = amount of resource i consumed by each unit of activity j.
7. FORMS of Linear Programing
The canonical form
• Objective function is of maximum type
• All decision variables are non negative
The Standard Form
• All variables are non negative
• The right hand side of each constraint is non negative.
• All constraints are expressed in equations.
• Objective function may be of maximization or minimization
type.
Important Definitions in Linear Programming
Solution:
A set of variables [X1 ,X2,...,Xn+m] is called a
solution to L.P. Problem if it satisfies its constraints.
Feasible Solution:
A set of variables [X1 ,X2,...,Xn+m] is called a
feasible solution to L.P. Problem if it satisfies its
constraints as well as non-negativity restrictions.
Optimal Feasible Solution:
The basic feasible solution that optimises the
objective function.
Unbounded Solution:
If the value of the objective function can be
increased or decreased indefinitely, the solution is called
an unbounded solution.
8. ADVANTAGES .
• By converting a primal problem into dual computation
becomes easier , as the no. of rows(constraints) reduces in
comparison with the no. of columns( variables).
• Gives additional information as to how the optimal solution
changes as a result of the changes in the coefficients. This is
the basis for sensitivity analysis.
• Economic interpretation of dual helps the management in
making future decisions.
• Duality is used to solve L.P. problems in which the initial
solution in infeasible.
SENSITIVITY ANALYSIS .
(POST OPTIMALITY TEST)
Two situations:
• In formulation , it is assumed that the parameters such as
market demand, equipment capacity, resource consumption,
costs, profits etc., do not change but in real time it is not
possible.
• After attaining the optimal solution, one may discover that a
wrong value of a cost coefficient was used or a particular
variable or constraint was omitted etc.,
• Changes in the parameters of the problem may be
discrete or continuous.
• The study of effect of discrete changes in parameters
on the optimal solution is called as "Sensitivity
analysis".
• The study of effect of continuous changes in
parameters
• on the optimal solution is called as "Parametric
Programming."
• The objective of the sensitivity analysis is to
determine how sensitive is the optimal solution to
the changes in the parameters.
9. AREAS OF APPLICATION OF
LINEAR PROGRAMMING
Industrial Application
• Product Mix Problem
• Blending Problems
• Production Scheduling Problem
• Assembly Line Balancing
• Make-Or-Buy Problems
• Management Applications
Media Selection Problems
• Portfolio Selection Problems
• Profit Planning Problems
• Transportation Problems
• Miscellaneous Applications
Diet Problems
• Agriculture Problems
• Flight Scheduling Problems
• Facilities Location Problems
Advantages of linear programming
• It helps in attaining optimum use of productive factors.
• It improves the quality of the decisions.
• It provides better tools for meeting the changing conditions.
• It highlights the bottleneck in the production process.
Limitation of linear programming
• For large problems the computational difficulties are
enormous.
• It may yield fractional value answers to decision variables.
• It is applicable to only static situation.
• LP deals with the problems with single objective.