a variable that is added to inequality constraint to change it into equality.

IT IS THE EXCESS TIME IN PRODUCTION

the slack is what we call the excess production

A slack variable in an optimization problem is a variable that is added to an inequality constraint to change it into an equality :))

Its excess time in production

Slack can be defined as excess time in production 

Excess time in production 

It is the excess time in the constraint of a process and they are used in converting inequalities to equalities.

Excess time in production

Slack variables represent the "slack" or surplus in the constraints of the problem.

Slack variable is a non negative variable.

slack variables are used to measure the excess or "slack" in constraints, indicating the degree to which a constraint can be loosened without affecting the viability of the solution.

Slack Variable is a non negative variable

To convert inequality constraints into equality constraints. 

Slack refers to surplus time in the production process

slack variables are used to measure the excess or "slack" in constraints, and to convert inequality to equality constraints.

it is the excess time in production

slack variables are used to measure the excess or "slack" in constraints, and to convert inequality to equality constraints.

Slack Variable is a form of matrix to balance and maximize.

in an optimization problem

Slack variable is a variable that is added to an inequality constraint to transform it into an equality.

It was the excess time of a production

Slack variables are defined to transform an inequality expression into an equality expression with the added slack variable.