# Category: Excel solver example xls

During these challenging times, we guarantee we will work tirelessly to support you. We will continue to give you accurate and timely information throughout the crisis, and we will deliver on our mission — to help everyone in the world learn how to do anything — no matter what.

Thank you to our community and to all of our readers who are working to aid others in this time of crisis, and to all of those who are making personal sacrifices for the good of their communities. We will get through this together. Updated: January 16, Tech Tested. This wikiHow teaches you how to use Microsoft Excel's Solver tool, which allows you to alter different variables in a spreadsheet in order to achieve a desired solution.

You can use Solver in both Windows and Mac versions of Excel, though you'll have to enable Solver before you can begin using it. Enable Solver in the "Add-ins" section of your Excel preferences if necessary. Open a spreadsheet with data you want to analyze.

We use cookies to make wikiHow great. By using our site, you agree to our cookie policy. As the COVID situation develops, our hearts ache as we think about all the people around the world that are affected by the pandemic Read morebut we are also encouraged by the stories of our readers finding help through our site.Solver tool in excel is quite a useful tool for those who are into the analysis domain which is used for operations research to find the optimum solution for any kind of decision problem.

Solver tool can be activated in excel from Excel Options under the tab Add-Ins. In Solver, we just need to add the cell formula or problem need to solve, then select the cells which is affecting. Start Your Free Excel Course. Step 1: Firstly go to File and Options at the left-hand side of the excel. Step 3: A t the bottom, you will see Excel Add-ins, select that, and click on Go…. A solver tool is very simple to use. Let us now see how to use the Solver tool in Excel with the help of some examples.

SUM function adds those two cell values and gives the sum. Step 3: Once you click on Solver, it will open the below dialogue box.

Step 4: In the Set Objective give a link to the cell that we want to change. In this example, the cell we want to change is the cell B3.

Step 6: Now in By Changing Variable Cells: select the cells you want to change the values to get the sum of Step 7: Now comes the criteria part. Click on ADD option in the Solver dialogue box. Step 8: Once you click on the ADD item it will open the below dialogue box. In this box, we need to mention our first criteria. Once you set, the criteria, click on Add.

It will add the criterion to the solver box, the current values will be stored, and the same box will once again show up with no values. Step 9: In the same box give the second criteria. The second criterion is X should be an integer value. Click on Add button. For this variable criteria is it should be greater than equal to 25 and should be an integer.

Excel will take some 15 seconds to run it. By selling units at a basic rate of 15 per unit, I will earn as profit. However, I want to earn a minimum profit of by increasing the unit price. Step 2: Set the objective cell as B8 and the value of and by changing the cell to B3. Step 3: I do not have such criteria to be satisfied to increase the unit price. This has been a guide to Excel Solver tool. Here we discuss how to use Solver tool in Excel along with practical examples and downloadable excel template.

Free Excel Course. By continuing above step, you agree to our Terms of Use and Privacy Policy. Login details for this Free course will be emailed to you.Solver is a Microsoft Excel add-in program you can use for optimization in what-if analysis. According to O'Brien and Marakas, optimization analysis is a more complex extension of goal-seeking analysis.

Instead of setting a specific target value for a variable, the goal is to find the optimum value for one or more target variables, under certain constraints. Then, one or more other variables are changed repeatedly, subject to the specified constraints, until you discover the best values for the target variables.

In Excel, you can use Solver to find an optimal value maximum or minimum, or a certain value for a formula in one cell called the objective cell, subject to certain constraints or limits, on the values of other formula cells on the worksheet. This means that the Solver works with a group of cells called decision variables that are used in computing the formulas in the objective and constraint cells. Solver adjusts the values in the decision variable cells to satisfy the limits on constraint cells and produce the result you want for the objective cell. Determining the monthly product mix for a drug manufacturing unit that maximizes the profitability. The Add-Ins dialog box appears. Check Solver Add-in and click Ok. Each constraint satisfies the linear model requirement.

### Excel Solver - Sample Worksheets

Used for smooth nonlinear problems. The calculation of the value in the objective cell includes the values in the decision variable cells. Suppose you are analyzing the profits made by a company that manufactures and sells a certain product. You are asked to find the amount that can be spent on advertising in the next two quarters subject to a maximum of 20, Cost per unit.

Note that we have used the Min function to take care to see that the no. Cells — C9 and D9. Cost for that quarter Cells — C11 and D Decision Variable cells are C8 and D8 that contain the budgets for the two quarters — Quarter1 and Quarter2. Cell C15 that contains the no. Cell C16 that contains the no. The Solver Parameters dialog box appears. Set the constraint for total budget as given below and click Add. The Solver Parameters dialog box appears with the three constraints added in box —Subject to the Constraints.

The Solver Results dialog box appears. As you can observe, the current iteration values are displayed in your working cells. You can either stop the Solver accepting the current results or continue with the Solver from finding solution in further steps.

The Show Trial Solution dialog box appears at every step and finally after the optimal solution is found, Solver Results dialog box appears. Your worksheet is updated at every step, finally showing the result values. You can save the last selections in the Solver Parameters dialog box with a worksheet by saving the workbook.

Each worksheet in a workbook can have its own Solver selections, and all of them will be saved when you save the workbook. You can also define more than one problem in a worksheet, each with its own Solver selections. To save a problem model, enter the reference for the first cell of a vertical range of empty cells in which you want to place the problem model.

Click Save. The problem model the Solver Parameters set appears starting at the cell that you have given as the reference. To load a problem model, enter the reference for the entire range of cells that contains the problem model.

### How to use Solver in Excel with examples

Then, click on the Load button. Optimization with Excel Solver Advertisements. Previous Page.To let the Excel Solver know which cells on the worksheet represent the decision variables, constraints and objective function, we click Solver button on the Excel Data tab, or the Premium Solver button on the Add-Ins tab, which displays the Solver Parameters dialog.

Click on the image to see it full-size. We choose the Add button again either from the Add Constraint dialog above, or from the main Solver Parameters dialog to define the non-negativity constraint on the decision variables. Frontline's Premium Solver products can emulate either style, and they also offer a new Ribbon-based user interface.

To find the optimal solution, we simply click on the Solve button. This means that we should build 23 pallets of Tahoe panels, 15 pallets of Pacific panels, 39 pallets of Savannah panels, and 0 pallets of Aspen panels. The message "Solver found a solution" appears in the Solver Results dialog, as shown above.

After a moment, the Solver creates another worksheet containing an Answer Reportlike the one below, and inserts it to the left of the problem worksheet in the Excel workbook. This report shows the original and final values of the objective function and the decision variables, as well as the status of each constraint at the optimal solution.

If you've gotten to this point, congratulations! You've successfully set up and solved a simple optimization problem using Microsoft Excel. If you haven't yet read the other parts of the tutorial, you may want to return to the Tutorial Start and read the overviews "What are Solvers Good For? This was an example of a linear programming problem. To learn more, click Optimization Problem Types. For a more advanced explanation of linearity and sparsity in optimization problems, continue with our Advanced Tutorial.

Linear Programming with Excel Solver

Live Chat Help Desk. Get expert help from one of our certified partners, by signing up for a Quick Model Review or a Business Problem Assessment. Get Expert Help. Finding and Using the Solution To find the optimal solution, we simply click on the Solve button. Want to get more from the Excel Solver?The Microsoft Excel solver add-in is one of the features that makes creating engineering and financial models in a spreadsheet a powerful tool.

To be called a "solver" doesn't do it justice, though, because it is really a powerful optimization algorithm. The tool was developed by Frontline Systems, Inc. This article provides a couple of examples of how to use the Excel solver and call it using a VBA macro.

If you want to experiment with using the Solver on financial models, you could try it out on one of my financial calculators such as the Home Mortgage Calculator. Excel's built-in Goal Seek tool is often enough to solve for x given ybut when you want to add multiple criteria and allow multiple inputs to change, that's where Solver comes in.

Note: You do not need to download the Solver add-in. Our first example is to going to be very basic, but it will introduce common terms used in optimization, such as objective functiondesign variablesand constraints.

Our objective function is the value that we are going to minimize f. The design variables are the variables that we are going to allow the Solver to change just x in this example. A convenient way of setting up this problem in Excel is to make a clear distinction between the objective, design variables, and constraints.

A screen shot of the example problem is shown below, including the graph of the function so that you can see that the answer should be somewhere between 0 and 2. Figure 1: Screenshot of example problem 1. Our only design variable is xso the only cell we are going to change is B Figure 2: Screenshot of the solver add in dialog box for sample problem 1. In this next practice problem, the solver is used to find values for the unknown angles q 2 and q 3 in the following system of equations. Notice that these equations are in implicit form equal to zero.

To solve the system, we will create an objective function that when minimizeddrives both equations to zero. Minimizing the sum of the squares of each implicit equation will accomplish this.

The layout for this problem is shown in the screenshot below. The known variables are called analysis variables and will be treated as constants. Our unknowns, q 2 and q 3are the design variables. For this example problem, we don't have any constraints. Figure 3: Screenshot of example problem 2. The screenshot above shows one solution to the problem, but the solution will depend upon the starting values that you have chosen for the unknown angles.

You should get a different solution! The figure below is an example of a mechanism that can be described using these equations. The second solution is represented by the dashed lines. Figure 4: Mechanism showing two possible configurations.

This example has demonstrated a very important point having to do with the Excel solver and optimization in general. The solution may depend upon the starting values. For optimization problems, this means that the solution may be only a local optimum.The tutorial explains how to add and where to find Solver in different Excel versions, from to Step-by-step examples show how to use Excel Solver to find optimal solutions for linear programming and other kinds of problems.

Everyone knows that Microsoft Excel contains a lot of useful functions and powerful tools that can save you hours of calculations. But did you know that it also has a tool that can help you find optimal solutions for decision problems?

In this tutorial, we are going to cover all essential aspects of the Excel Solver add-in and provide a step-by-step guide on how to use it most effectively. Excel Solver belongs to a special set of commands often referred to as What-if Analysis Tools. It is primarily purposed for simulation and optimization of various business and engineering models. The Excel Solver add-in is especially useful for solving linear programming problems, aka linear optimization problems, and therefore is sometimes called a linear programming solver.

Apart from that, it can handle smooth nonlinear and non-smooth problems. Please see Excel Solver algorithms for more details. While Solver can't crack every possible problem, it is really helpful when dealing with all kinds of optimization problems where you need to make the best decision. For example, it can help you maximize the return of investment, choose the optimal budget for your advertising campaign, make the best work schedule for your employees, minimize the delivery costs, and so on. The Solver add-in is included with all versions of Microsoft Excel beginning withbut it is not enabled by default.

In the modern versions of Excel, the Solver button appears on the Data tab, in the Analysis group:. After the Solver Add-in is loaded to Excelits command is added to the Tools menu:.

Before running the Excel Solver add-in, formulate the model you want to solve in a worksheet. In this example, let's find a solution for the following simple optimization problem. Supposing, you are the owner of a beauty salon and you are planning on providing a new service to your clients. Goal : Calculate the minimal cost per service that will let you pay for the new equipment within the specified timeframe.

For this task, I've created the following model:. On the Data tab, in the Analysis group, click the Solver button. The Solver Parameters window will open where you have to set up the 3 primary components:. Exactly what does Excel Solver do with the above parameters? It finds the optimal value maximum, minimum or specified for the formula in the Objective cell by changing the values in the Variable cells, and subject to limitations in the Constraints cells.

The Objective cell Target cell in earlier Excel versions is the cell containing a formula that represents the objective, or goal, of the problem. The objective can be to maximize, minimize, or achieve some target value. Variable cells Changing cells or Adjustable cells in earlier versions are cells that contain variable data that can be changed to achieve the objective.

Excel Solver allows specifying up to variable cells. The Excel Solver Constrains are restrictions or limits of the possible solutions to the problem. To put it differently, constraints are the conditions that must be met.

## Excel Solver Tool

Excel Solver allows specifying the following relationships between the referenced cell and the constraint.This article discusses using Solver, a Microsoft Excel add-in program you can use for what-if analysis, to determine an optimal product mix. Companies often need to determine the quantity of each product to produce on a monthly basis. In its simplest form, the product mix problem involves how to determine the amount of each product that should be produced during a month to maximize profits.

Product mix must usually adhere to the following constraints:. There is a limited demand for each product. You can find the solution to this problem in the file Prodmix. Production of each product requires labor and raw material. Row 4 in Figure shows the hours of labor needed to produce a pound of each product, and row 5 shows the pounds of raw material needed to produce a pound of each product.

For example, producing a pound of Product 1 requires six hours of labor and 3. For each drug, the price per pound is given in row 6, the unit cost per pound is given in row 7, and the profit contribution per pound is given in row 9. For example, demand for Product 3 is pounds. This month, hours of labor and pounds of raw material are available.

How can this company maximize its monthly profit? If we knew nothing about Excel Solver, we would attack this problem by constructing a worksheet to track profit and resource usage associated with the product mix. Then we would use trial and error to vary the product mix to optimize profit without using more labor or raw material than is available, and without producing any drug in excess of demand.

We use Solver in this process only at the trial-and-error stage. Essentially, Solver is an optimization engine that flawlessly performs the trial-and-error search. A key to solving the product mix problem is to efficiently compute the resource usage and profit associated with any given product mix.

Our labor usage is calculated by. However, entering these formulas in a worksheet for six products is time-consuming. Imagine how long it would take if you were working with a company that produced, for example, 50 products at their plant. The formula in cell D15 computes raw material usage. In a similar fashion, our profit is determined by. We now can identify the three components of our product mix Solver model.