2021-10-25

## What is two-phase method Wikipedia?

Two-phase flow can occur in various forms, such as flows transitioning from pure liquid to vapor as a result of external heating, separated flows, and dispersed two-phase flows where one phase is present in the form of particles, droplets, or bubbles in a continuous carrier phase (i.e. gas or liquid).

## What is basic feasible solution in simplex method?

In the theory of linear programming, a basic feasible solution (BFS) is a solution with a minimal set of non-zero variables. Geometrically, each BFS corresponds to a corner of the polyhedron of feasible solutions. If there exists an optimal solution, then there exists an optimal BFS.

## What is the simplex process?

Simplex is a creative problem solving process that is used to identify solutions to complex problems. The Simplex process provides a systematic approach for problem solving that encourages innovation and creativity through critical thinking.

## Why is it called the simplex method?

In mathematical optimization, Dantzig’s simplex algorithm (or simplex method) is a popular algorithm for linear programming. The name of the algorithm is derived from the concept of a simplex and was suggested by T. S. Motzkin.

## How do you solve an unbalanced assignment problem?

Unbalanced Assignment Problem. If number of rows is not equal to number of columns then it is called Unbalanced Assignment Problem. So to solve this problem, we have to add dummy rows or columns with cost 0, to make it a square matrix. Here given problem is unbalanced and add 1 new column to convert it into a balance.

George Dantzig

## Why do we use two-phase simplex method?

Second Phase: Using simplex method make iterations till an optimal basic feasible solution for it is obtained. It may be noted that the new objective function W is always of minimization type regardless of whether the given (original ) L.P.P. is of maximization or minimization type.

## What is penalty method in LPP?

A penalty method replaces a constrained optimization problem by a series of unconstrained problems whose solutions ideally converge to the solution of the original constrained problem. The measure of violation is nonzero when the constraints are violated and is zero in the region where constraints are not violated.

## What is Modi method in operation research?

The modified distribution method, is also known as MODI method or (u – v) method provides a minimum cost solution to the transportation problems. This model studies the minimization of the cost of transporting a commodity from a number of sources to several destinations.

## What is the purpose of simplex method?

Simplex method is an approach to solving linear programming models by hand using slack variables, tableaus, and pivot variables as a means to finding the optimal solution of an optimization problem. Simplex tableau is used to perform row operations on the linear programming model as well as for checking optimality.

## What is feasible solution in LPP?

Feasible solution to a L.P.P: A set of values of the variables, which satisfy all the constraints and all the non-negative restrictions of the variables, is known as the feasible solution (F.S.) to the L.P.P.

## How do you solve simplex method in operation research?

Simplex method is suitable for solving linear programming problems with a large number of variable. The method through an iterative process progressively approaches and ultimately reaches to the maximum or minimum values of the objective function.

## What is artificial variable in LPP?

In order to use the simplex method on problems with mixed constraints, we turn to a device called an artificial variable. This variable has no physical meaning in the original problem and is introduced solely for the purpose of obtaining a basic feasible solution so that we can apply the simplex method.

## Who invented assignment problem?

In 2006, it was discovered that Carl Gustav Jacobi had solved the assignment problem in the 19th century, and the solution had been published posthumously in 1890 in Latin.

## What is the dual simplex method?

The Simplex Method1 pivots from feasible dictionary to feasible dictionary attempting to reach a dictionary whose -row has all of its coefficients non-positive. This new pivoting strategy is called the Dual Simplex Method because it really is the same as performing the usual Simplex Method on the dual linear problem.

## What is LPP?

Linear Programming Problems (LPP): Linear programming or linear optimization is a process which takes into consideration certain linear relationships to obtain the best possible solution to a mathematical model. It is also denoted as LPP.