Solver With Constraints For Inventory Levels
Nov 9, 2008
I have a maximization problem. I have to maximize Kitchen Sets given available materials. I have 11 different Kitchen Sets and every set requires different material.I have attached an excel spreadsheet for making the problem more clear.
I have T1;T2;T3;T4;M1;M2;M3;M4;O1;O2;O3;O4;Z1;Z2;Z3;Z4 different materials. Every kitchen sets requires one material from T which is fixed (for example T2), one material from M which is fixed again (for example M3), one material from O which is fixed (for example O1) and one material from Z, which is fixed (for example Z4).To complete a set the sum of all materials used should equal to 4. I have some constrains T1+T2+T3+T4<=2 it is the same for M1+M2+M3+M4<=2, O1+O2+O3+O4<=2 and Z1+Z2+Z3+Z4<=2.
So basically my goal is to say which materials should I keep in stock in order to maximize the Kitchen Sets.
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Sep 10, 2012
How do I print multiple inventory labels based on our inventory levels?
For example:
Item No 1000
Descr Window
Customer Taylor
PO 9001
Quantity 10
Item No 1010
Descr Door
Customer Jones
PO 9011
Quantity 35
I want to print 10 labels with the info from Item No 1000 and 35 labels from Item No 1010????
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Sep 10, 2006
I have a cell, D5, which is the sum of three other cells, A5 B5 and C5. (all currently empty). Cells A1 through C4 are filled with various numbers.
What I've been trying to do is use solver to say: Make D5 equal 200, do it by manipulating only A5 B5 and C5, and make it subject to the constraint that A5 must equal a value selected from A1:A4, and B5 must equal a value from B1:B4, and C5 ...etc. I have deliberately set it up so that there is only one solution.
I was doing fine until trying to create the constraints. How can I make a constraint that says "this cell" must equal "one of the following cells"? And if I can't do that, is there an alternate method of achieving the same result?
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Mar 26, 2012
I want to set constraints as an integer in solver. But I don't know how to do it.
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Mar 9, 2008
I was able to find a solution using the excel solver add in but unfortunately it cant take more then 200 constraints and hence gives an error. I am unable to find a different approach to this problem.......
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Apr 11, 2014
I want to take a shot at this spreadsheet exercise. Setup similar spreadsheet models.
Excel Exercise.xlsx
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Mar 18, 2009
I'm trying to use solver to find the minimum value of a cell by changing 5 separate cells. These cells are subject to a set of constraints that are formulae. On top of that I have a large number of these solve's to run (The spreadsheet is creating randomly distributed data to form a Monte Carlo simulation). Therefore I am referencing the formulas using the ActiveCell, Offset() function. For some reason when running this code none of the values are changed. Also I changed the UserFinish to false so I could see what solver was doing at each solve, It stops at the correct cell (one after the final cell) but without me having to confirm it each time.
Here is the ....
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Aug 18, 2009
I had been trying really hard to get some solution on COGS valuation & inventory valuation on FIFO basis. my daily transactions are typical sales & purchases.
Attached is the inventory in/out movement from Quick Books. in the column "Num" type bill is the entry from purchase bill whihc always has a reference as P/O####. This is how i will capture the landed cost against a PO., another type "Inv Adj" is inter warehouse transfer. Name is cusotmer, Inventory is my item number. in some cases it is like "2000", in some cases it is 10000:10121, and in some cases it is 10000:10200:10201 that is why they fall in different columns when i export them.
What I would lilke to do: 1) Run a report by month, by customer showing cost of goods sold on FIFO basis, I can capture sales amount by running another report.
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Aug 8, 2006
I am not an excel whiz, so I will need layman's terms if possible. I may have found a solution to my problem under another thread, but I couldn't understand it. I have only briefly worked with macros, a very long time ago. Here goes...
I have an inventory list that has not been updated for sales of the inventory, only for purchases. I have sales lists, generally by month, in separate spreadsheets. I am looking for a simple, efficient way of either eliminating or at least matching up the data in the sales list to the inventory list in order to remove sold items from inventory (on paper). I am hoping the result will be a fairly accurate inventory list, and related value, so that a physical inventory count won't be necessary at this time. Obviously I could copy all of the sales info into one spreadsheet, sort by inventory number, then manually delete all sold items from the inventory listing. I am REALLY hoping there is a better option.
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Feb 27, 2007
I have a workbook. The second tab is inventory numbers and the first tab has my inventory items. I scan in the inventory number (unique) and it adds it to my inventory sheet. As I use inventory I scan the barcode and it inputs the serial number into my used inventory tab. What I need to do it when I scan the serial number for used inventory into the used inventory sheet to have it go to the inventory sheet and delete the line for that serial number.
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Jan 12, 2007
I have to use use the solver to calculate something (a mean-variance framework).
I am using the solver to minimize a cartain cell (variance) by making two cells equal through (expected return) by varying 10 cells( weights of assets), but I have to repeat this for 500+ times (for different expected returns).
Someone told me that I could best use some sort of loop through VBA. But I don't have a clue how that works.
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Jul 22, 2014
I am trying to maximize fantasy football points based on projected points scored, salary and positional limits.
I have multiple sheets dedicated one per position (i.e. sheet named "QB", sheet named "RB", etc.). The relevant columns are: Name; FPT (projected points); Cost
NOTE: I have combined all the data into "sheet1" if necessary.
I need a VBA program or Solver to diagnose the largest possible combination of projected points based on the following constraints:
Constraint 1: Total value must be less-than or equal to $1,000,000
Constraint 2: Total players used must be equal to 10
Constraint 3-?: Of the 10, 2 must be QB, 2 must be RB, 2 must be WR, 1 must be TE, 1 must be DEF.....the other 2 can be RB, WR or TE
Obviously, each player can only be used once and I'm not sure if Solver can abide by that constraint, nor do I know how to apply the others. I'm thinking VBA could work, but I'm not familiar enough with the language to hammer out the code.
I have a small macro that downloads some data from a website and tweaks it Daily fantasy cheatsheet.zipa little, but I hope that won't affect any computations involving those values.
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Dec 20, 2006
I need to calculate time period worked between 19h00 and 24h00 in following exemples,
start time 08h00 and End time 20h00, would be 1 hour
start time 20h00 and End time 08h00, would be 4 hours
I can't get IF fonction to work with times..
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Sep 30, 2007
i've two time constraints with 22:00~6:00 and 6:00~22:00. i'll apply time span to two constraints,calculate time covering on two constraints. it will start at anywhere of 00:00~24:00, time span will be 00:00 ~24:00. i add some formula, a3=start time, b3=end time. time constraints with 22:00~06:00:
=IF(AND(A3<=22/24,B3>=6/24,A3>B3),8/24,IF(AND(A3<6/24,OR(B3>22/24,AND(B3>0,B3<6/24,A3>B3))),IF(B3>=22/24,(B3-22/24)+A3-6/24,(B3+1-22/24)+MOD(6/24-A3,1)),IF(AND(OR(A3>=22/24,A3<B3,A3=0),B3<=6/24),IF(OR(A3=0,A3=1),B3,IF(A3>B3,B3+1-A3,B3-A3)),IF(AND(A3<=22/24,B3<=6/24),MOD(B3-22/24,1),IF(AND(A3>=6/24,B3<=22/24,A3<B3),0,IF(AND(A3>=22/24,B3>=6/24),(1-A3)+6/24,IF(AND(A3<=22/24,B3>22/24),B3-22/24,6/24-A3)))))))
time constraints with 06:00~22:00. :C$3=start time,$B4=end time...............................
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Aug 9, 2008
I am trying to write VBA code that will list all possible combinations of data contained in a worksheet based on a few conditions. I have a list that varies in length. In the first column is a list of numbers denoting a particular course number. In the second column is a list of numbers denoting the specific class number for the course. As an example, I have a 6 courses. The first course has 1 class, the second course has 3 classes, the third has 11, the fourth has 3, the fifth has 7, and the sixth has 6. Thus, my columns look like this:
A B
1 1
2 1
2 2
2 3
3 1
3 2
3 3
3 4
3 5
...
I need to list out all possible combinations of classes given that I must have all six courses. EXAMPLE (Course, Class):.......................
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Jul 9, 2014
Whenever or not I should use VBA or ordinary formulas in Excel in order to do Vehicle Routing With Two-Dimensional Loading Constraints case. What I need is when I have coordinates of four bottom-right corners:
X Y
24 0
30 0
10 24
8 38
2L-CVRP, what I want to know is: In reality I have set of 200 coordinates (x,y) and I need to search for lowest y (its (24,0) and (30,0)) then I choose one with maximum x ((30,0) in this case). Then if for some reason item cannot be packed there, then I shall go to next lowest y, which is 24 giving coordinate (10,24), if I cannot use this corner, I search for next lowest y with as high x as possible, etc. BTW I use Evolver in order to find satisfying solution.
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Aug 11, 2008
I need to optimize an Excel model with 5 variables each of which cam be any value from 1 to 20. The solution space, therefore, contains 3,200,000 combinations. I have a software(Palisade Risk) which can give out a random sampling of this solution space. I need to know how many combinations can be considered as a representative sample of this solution space - e.g. can it be 1%?.
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Feb 17, 2009
This is the code where you click on a cell that has been input from Data Validation, it gets a pop up textbox showing the text input. One drawback I see here is that when the sheet is protected, one needs to tick 'Edit Objects' in 'Allow all users of this worksheet to:' window to get the textbox to pop-up otherwise no textbox is shown.
So this leads to the accessed user to have the ability of deleting and moving the textbox in the protected spreadsheet. Do you have any idea to Protect the sheet, Get the textbox to pop up,
Disallow user to delete/move the textbox.
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Nov 20, 2009
I have data for 500 companies over 10 years, in three criterions: “EPS”, “DPS” & “PX” (i.e. earnings, dividends and price).
For each company I have four lines recording the data, and given a letter code indicating how the change in dividends and earnings have been according to the following
(Examples)
DD-ED = Dividends Decreased & Earnings Decreased
ND-EI = No Dividends & Earnings Increased
As can be seen below this code is present for each company
What I need help with is some sort of lookup function which takes the average of the price changes (which is given in numerical values) only for the companies which code is equal to the code in the reference field.
So something like: =AVERAGE(IF((MOD(ROW(D2:D2353)-ROW(D2)+1,5))=0,IF(D2:D2353"",D2:D2353))) (currently counting every 5th line, since there is 4 lines between respectively PX/DPS/EPS for each company) –But with a constraint indicating only to include the value in the calculation if the codes are the same (e.g. "DI-EI" = "DI-EI").
So that the value, which is currently 20.96% (which now includes ALL price values), would only include those for the respective group (in this case, companies in the DE-EI group).
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Jan 21, 2009
I want to use solver program. But when solver "changes cells" i want it to trigger my pivot tables in the workbook. So i added the code to my worksheet:
Private Sub Worksheet_Change(ByVal Target As Range)
ThisWorkbook.RefreshAll
End Sub
So when a change occurs, all my pivot tables will get refreshed and my data will change. Is solver able to trigger this event while solving an optimization problem?
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Mar 27, 2008
how to go about actually doing it,
For an old project which was a till system i had two sheets,a data sheet and till system sheet , the data sheet contained :
example:
column A - numbering of the data (to be used with V Lookup)
column B - product name
Column C - price
This would then be replicated in the next 3 cells for the next data category.
Till system then had a combo box which had a cell link on the current page and data from the data sheet and then i had a price column next to i (containing V Lookup formula) the price then changed depending on the choice in the combo box.
I want to incorporate combo box's in to this new project. If i can then get some kind of stock thing i intend on then using conditional formating to colour code stock levels to show severity of needing to order etc..
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Aug 16, 2009
I need to create a spreadsheet that will calculate the difference between two dates and show the result in days. The complicated part is that weekends (Sat and Sun) need to be ignored and any time after 4:30 pm needs to be treated as the next business day. I have been trying to look at similar questions in forum and use the WORKDAYS function with little success.
Example:
A1- 14/08/09 4:40 p.m.
B1- 17/08/09 9:10 a.m.
I need the answer (B1-A1) to show up as 0. But if the time in A1 was changed to 4:20 p.m. than the answer should be 1 day.
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Apr 3, 2014
Im recieving an error saying that i have too many levels of nesting for my formula
Is there any way to rewrite the formula i have here?
=if(I1>99,0.5,
if(I1>89,0.45,
if(I1>79,0.4,[code].....
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Sep 15, 2009
I am trying to use the command below to report what type of bonus is to be awarded. .05% - 1% bonus, commission based.
=IF(E7>=0.12,1,IF(AND(E7>=0.115,D11<=0.1199),".09",IF(AND(E7>=0.11,E7<=0.1149),".08",IF(AND(E7>=0.10 5,E7<=0.109),0.07,IF(AND(E7>=0.10,E7<=0.1049),"0.06",IF(AND(E7>=.095,E7<=.099),".5",IF(AND(E7>=.09,E 7<=.0949),".04",IF(AND(E7>=.085,E7<=.0899),".03",IF(AND(E7>=.08,E7<=.08499),.025, IF(AND(E7>=.07,E7<=.0799),".15",IF(AND(E7>=.065,E7<=.0699),".005")))))))
It is telling me there are too many levels. I am not an Excel expert, so I am trying to figure out an alternative to this command, I am sure one is available.
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Oct 9, 2013
I have a report of employees' hours reported for the week, which I process payroll from.
I have sorted the spreadsheet first by employee number, and then by date. I have subtotaled each day's hours (with a formula rounding each day's hours to the nearest quarter hour).
I now need to add a subtotal of weekly hours, per employee number, and I cannot figure out how to do this.
Here is an example of what I want to do. I have highlighted the second subtotal I want to add to the spreadsheet, but have been doing the =sum(xxx) formula for each employee because I can't figure out how to subtotal again.
David L 9/30/2013 0005 360 6:00 A.M. 12:00 P.M.
David L 9/30/2013 0005 112 12:30 P.M. 2:22 P.M.
David L 9/30/2013 0005 115 2:22 P.M. 4:17 P.M.
David L 9/30/2013 0005 13 4:17 P.M. 4:30 P.M.
[Code].....
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Nov 22, 2006
Right now, I've this pop up box which prompts users for passwords and user name for log in. They are two main users : Admin and User. Admin is the user which is allowed to see all sheets. While User is only restricted to user interface sheets.
The problem is for the "User" I want to restrict a view in the sheet
"ELEMENT". I wish to hide columns L to AI if "User" logs in. But if "Admin" logs in, I want no columns hidden. Everything must be visible.
Private Sub CommandButton1_Click()
Sheets("Main").Select
Dim strUser As String, strPword As String, strWs As String
Dim w As Worksheet, c As Range, r As Range
strUser = Me.TextBox1.Value
strPword = Me.TextBox2.Value
Select Case strUser
Case "User"
If strPword = "User" Then
Sheets("SMXINVENTORY").Visible = xlSheetVisible
Sheets("SMVINVENTORY").Visible = xlSheetVisible
Sheets("SMIINVENTORY").Visible = xlSheetVisible
Sheets("SMF1INVENTORY").Visible = xlSheetVisible..............
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Aug 21, 2012
I have daily data that has columns for day, day of week, week end, month, year. I am trying to create a pivot chart that displays the data as a line chart day by day and as a secondary axis column chart by week.
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Jun 24, 2014
How can I format a Pivot Table with 5 levels. I try to use the "Design" but it only format the first 2 levels of the Pivot Table. I need to distinguish each level with different colors. I think manually is a bit difficult.
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May 29, 2009
I need to convert levels to numerical values and then: Firstly, add together two vlookup values THEN divide by 2 to get an average AND THEN see if this average AND a second, individual lookup value are above a specified another value, which may be different. IF all these criteria are set, return, "yes" if either the first or second, or both criteria are not met then "no"
Or put it another way. if lookup values A+B/2>"5" AND C>"3" then "yes", Else "no"
Lookup chart:
P11
P22
P33
P44
P55
P66
1c7
1b9
1a11...............
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Sep 9, 2010
I created a PivotTable that works fine. A user can click on an option and the subcategories expand; then he can choose one of those and a new group opens, etc., going 4 or 5 levels deep in options.
What I need to do is: If he then wants to start over and choose another option in the initial level, I want all of the subcategories to reset to their original closed state (unexpanded). As it is now, when he goes back to the original choice, that is closed, but everything inside it is still open as he had selected them previously.
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