Employee Scheduling Using Solver
Sep 26, 2006
I have a scheduling problem that I'm trying to get my head around. Im sure that some kind person can give me some ideas on how to get this started. It may be extremely easy, but I just cant get it off the ground. Basically I have 15 doctors that work for me - 9 full time (38hrs/week) and 6 part time (15+hrs/week) in a general practice. We are open 7 days a week
Open Close
Monday8:3019:00
Tuesday8:3019:00
Wed8:3019:00
Thur8:3021:00
Fri8:3019:00
Sat9:0018:00
Sun9:0018:00
Doctors have 5 days on and then 2 days off.
The below is the proposed daily schedule and the doctor requirements. % of booked patients for the times and % of random patients for the times are included as well as average waiting times.
Booked Random Waiting Doctors
8:30 - 10:00Morning Hours55%45%30min5-7
10:00 - 13:00Increasing80%20%45min7-8
13:00 - 18:00Busy 100%01.5hr8+
18:00 - 19:00Decreasing70%30%1hr6-7
19:00 - 21:00Night 40%60%30min5+
There are 3 types of patient visits
ShortDoubleTriple
%0.810.140.05
Minutes153045
58% of patients choose their doctor and 42% come in off the street and will take the first available doctor.
and finally - doctors cant work for more than 4 hours without a break. brek details are below
HoursBreak
<4hrs0
4 - 5hrs10min
5 - 8hrs2*10 mins - 45min lunch
8+2 * 10min 2*45min lunch
I need to create a timetable for the doctors which optimises their time based on the above details. I also need to design a data sheet for reception which will maximise the number of patients seen. Finally I need to calculate what the maximum number of patients the centre can see on an average day say monday.
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May 4, 2013
I'm trying to come up with an Employee Shift Scheduling template. I have 6 employees total with 3 different shifts (day, swing, graveyard). I would like to not do a rotating shift. I'm trying to figure out if a 5X8 shift is better or 4X10 and I would like to come up with a weekly schedule where I can see what shift everyone is working and were I have double coverage.
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Feb 14, 2007
I'm trying to create an Employee Scheduler. I want my employees (1 technician per row for a total of 10 rows) in the 1st column then the monthly calendar to the right (1 cell/day). That is what you'll see when you open the worksheet. Then, down below I set up my Data Area where I input my project, start date, end date, technician (where each tech is assigned a unique number), and other data across a row of cells. This could be infinite (or at least up to the very last row).
I modified a free Project Scheduler I got from XL-EasyGantt to become my Employee Scheduler but am having some difficulties getting it to do what I want. The project Scheduler basically works by entering (on the same row) the project (or task), the start date and finish date and then the cells get automatically filled in across those dates. This allows for overlapping of tasks but I want to create an Employee Scheduler so it doesn't allow overlapping or schedule a technician to start a new project before he/she has completed the one their on.
The main function which is in each cell of the monthly calendar is as follows: =IF(OR(AND($G28>=K$4,$G28<L$4),AND($M28>=K$4,K$4>=$G28)),IF(AND($E11="x",$M28>=K$4,$M28<L$4),"x",IF($E11=".",".","..")),"")
My problem: I want to be able to look at the Main Schedule and see when each Technician is scheduled for a job (or multiple jobs) for any given month. I want the function to look in my Data Area and assign the start date and end date of a project and the corresponding technician number and fill in the date cells across from their name in the Schedule above.
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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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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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Jan 16, 2009
Attached is the file wherein I am trying to make the scheduling gantt for UAE calendar where the weekends are Friday and Saturday. I am not able to format sundays as workdays some how through my conditions.
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Nov 28, 2008
I have columns with the dates on the top, and staff listed on the rows to the left of the speadsheet. I must have 4 H's (indicating a base location), and 4 F's (indicating another base) in the column below the date. I want to have a cell, just above the date which will highlight red if there are any less than 4 H's and 4 F's. If there are 4 H's and 4 F's in the column (indicating full staffing levels), then I want the same cell to turn green, indicating that the day is OK. The red highlight would be a quick scan for supervisors to look at and see if we are deficient on staffing, and will prompt us to look for people who can be the missing H or F.
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Feb 14, 2007
I have a table like the one below:
Day Night
2/26/2007DC
2/27/2007AB
2/28/2007AB
3/1/2007 CD
3/2/2007 CD
3/3/2007 BA
3/4/2007 BA
Each letter represents a 12 hour shift (ex. D team has 36 hours for the week). If I need coverage on 2/27/07 on the day shift, I need to find a team that is working 36 hours for that week and was not scheduled to work the shift before or the shift after. (Example, on 2/27/07 A team needs coverage. The only teams working 36 hours are D and C. C team work the previous shift. So the code would input D in a cell).
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Feb 15, 2007
Is there a way to set the ontime application to run even when excel is turned off? I'd like to be able to refresh a data table every morning at 6:30, even if excel is not on. Ideally, if even my computer isn't on. The code below works, but only if the sheet is open to the exact worksheet.
Option Explicit
Public RunWhen As Double
Public Const cRunWhat = "The_Sub"
Sub StartTimer()
RunWhen = TimeValue("09:54")
Application.OnTime earliesttime:=RunWhen, procedure:=cRunWhat, _
schedule:=True
End Sub
Sub The_Sub()
'my code here
StartTimer
End Sub
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Sep 9, 2006
I have a simple macro that I run when I hit "Ctr Q".
How do I ensure that this macro runs every 5 minutes automatically from the first time I hit "Ctr-Q". Currently, it only runs once and then stops.
Here's my macro for your view:
Sub Macro1()
'
' Macro1 Macro
' Macro recorded 08-09-2006 by Scott
'
' Keyboard Shortcut: Ctrl+q
'
Range("B6").Select
ActiveCell.FormulaR1C1 = "NOW()"
Range("B6").Select
ActiveCell.FormulaR1C1 = "=NOW()"
Range("A4").Select
End Sub
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May 16, 2014
If i input a 3 in a1 how do i return data in the 3 rows below:
Attached File : schedule2.xlsx
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Jun 10, 2014
I have 20 staff members that I need to schedule in half day shifts (AM & PM) across three different locations for the month of July.
I want to make sure there is no overlap/duplication for any one staff in a time slot. Nor do I want any one staff member to work an AM and PM shift in the same day.
Ideally, I would also like to avoid back-to-back shifts (e.g., not allow PM on Monday to be scheduled for an AM on Tuesday).
Lastly, I would like to have the number of shifts be be as equitably distributed across all of the staff members as well.
Any way that I can do this in Excel?
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Apr 13, 2006
I have a macro that I want to run on an hourly basis, say at 9am, 10am, etc whenever the workbook is open. This needs to be definable as I have several users that will be conducting the same activity throughout the day. In other words I want the macro to run on the hour for user 1, quarter past the hour for user 2, half past for user 3 and quarter to for user 4. Each user does have their own unique macro to run so it should (hopefully) just mean introducing a line of code to each, defining the time to run.
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Oct 4, 2007
I have an excel spreadsheet that contains customer data exported from Quickbooks. In that file there is a column called CType (Column G) which contains the scheduling cycle for that customer. There are eleven different possible schedules, including 15xYr, 1xMo, 2xMo, EOM (every other month), EOW (every other week), EOW-S / 1xMo-W (every other week between 5/1 and 10/31 and once a month during the rest of the year), EOW-Th (every other week but must be on a Thursday), ETW (every third week), On Call, W, Q.
Although the number of records changes daily, on average there are about 950 rows of data in the spreadsheet.
I need to set up an array (?) for the values in column G starting with G2 through the last non-blank row (all records will have data in column G), and calculate the next scheduled service date based on the schedule type shown in column G and the last service date which will appear in column M of that row. The last thing I need to consider is whether there is a value in Column N, which would represent a hard-entered ‘Next Scheduled Service Date’. If I find a date in that column it needs to over-ride the calculated value. My assumption to this point is that I should use a new column T to hold the value of the calculated schedule date. There are a few other details, but rather than confuse this whole thing further I’ll stop there.
What I’m struggling with is the most efficient means of running this macro. I’ve been looking at many, many threads over the past few weeks, reading
VBA Programming for Dummies (which I apparently am), and reviewing other resources.
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Apr 9, 2008
I am wanting to have a schedule posted as 8:00am to 5:00pm to show up in a format that shows the interval every thirty minutes with either a 1 or a zero so that I can calculate each intervals total staffing. Also if a break or lunch is entered I would like it to show a zero or .5 in the field (.5 being for 15 mins and 0 for anything taking the full 30 mins).
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May 30, 2014
So I'm having a problem trying to make this scheduling sheet.. What I did was row a would be the employee list then b,c,d and so on are mon-sun Originally in b1 I would put like 9am-5pm and c1 8-4 and so on and in row i I put the total and added a sum function but somehow it wasn't able to calculate. So then I redid the whole thing this time in row b1 i put 9am and c1 5pm and so on and again I put the total and added the function and it still came out wrong..
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Apr 22, 2006
I need to dispatch 10 technicians across the US starting each Monday. They go to 10 different customers for the whole week. I know the distance between each technician and each customer. What I would like to do is assign each technician to a customer so that the total distance traveled for all the technicians is minimized. I know that if it was only 3 techs and 3 customers (as an example), I could build a table of all the possible combinations (3 factorial or 6 permutations), determine the distance for each permutation and select the minimum. I'm not sure that doing this method with 10 techs is feasible as the number of permutations is 10 factorial or over 3 million possibilities. Anyone see a workable solution?
I've include a spreadsheet with customers, technicians and the distances between them!
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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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Jan 13, 2009
I am making a schedule and I would like it to take out a 30 min break if the hours worked is over 6 hours.
I have so far
A B
1 11:00 7:30
=24*(B1-A1)
Gives me 8 hours, I would like it to subtract the 30 minutes only ifthe sum is over 6 and not alter the sum if it is under 6.
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Feb 14, 2008
I am trying to drive Solver in Excel 2000 with a Visual Basic (version given as 9969) macro. SolverReset is observed, and SolverAdd puts the constraints in. But the SolverOK statement does nothing, so the SetCell and the ByChange windows stay empty.
SolverSolve is trying to do something, because the spreadsheet cell that should receive the return code from Solver gets an error value #VALUE! (The macro then stops, unable to process this entry.)
Solver is checked off ok in the References list in V.Basic.
The same macro, same spreadsheet, in the same Excel file, works fine on the other computer in my office with what I am told is a more recent version of Excel; i.e. this doesn't look like a coding error.
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Sep 29, 2009
This is what I am looking to do and I am having an issue with it.
worksheet "beeble"
Column B has all the employee numbers listed from B3 to B100
Column C needs to have the emp name put in to them based on the emp number.
worksheet "weeble"
This sheet has the list of employees with their Emp#
A2 down to A99 is the number B2 on down is the name that belongs to the emp #
At issue is sheet "beeble" changes day to day depending who is scheduled to work in a certian area, otherwise this would be quite easy.. It is very easy for us to put the emp# in instead of the emp-name, so that is why wwe would need to be able to pull this information from the other sheet.
This may end up being very easy, but it is beyond me, and I cannot find what I need from a book, as I spent last night on here searching and reading through a few of my books..
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Jun 2, 2009
I wanted to see if I could use the solver to Solve Sudoku puzzles. I created the attached workbook. First it colors the numbers that are put in manually, which would be the starting puzzle. I have a generic one put in now. Then it finds which cells that are allowed to change. Then it is supposed to solve. It doesn't work. Run the Sheet1.SolvePuzzle Macro to see it not work. Is solver just not up to the task, or am I missing something?
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Feb 20, 2010
I recorded a macro using 'Solver'. When I try to run it, I get a message"Complie Error: Sub or Function not defined". Can anyone help me?
Heres the
Sub Macro1()
SolverOk SetCell:="$R$4", MaxMinVal:=3, ValueOf:="4275", ByChange:="$S$4"
SolverSolve
End Sub
I also tried this
Sub SolverMacro()
' Example Solver VBA Macro
SolverReset
SolverOk SetCell:="$R$4", MaxMinVal:=3, ValueOf:="4275", ByChange:="$S$4"
SolverSolve userFinish:=True
End Sub
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Dec 21, 2006
can I program a macro to run solver? ...
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Feb 4, 2008
I need to solve this using solver. I have an idea, but I'm not sure what to in regards to my objective function, and how to properly set up my constraints. I know I need to use sumproduct, but I'm not sure in what way. I'm using Excel 2007, here is the problem:
The Sweet Smell Fertilizer Company Markets bags of Manure is Combination of compost and Sewage Wastes. Each pound of Compost costs sweet smell $0.05 and has a fertilizer rating of 2 units. Each pound of sewage costs $0.004 and has a fertilizer rating of unit. To provide good quality fertilizer, each bag should contain at least 35 pounds of compost, not more than 40 pounds of sewage, and have total fertilizer rating of at least 100 units. Determine the lowest-cost blend of compose and sewage in each bag.
Here is what I have so far: ....
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Nov 17, 2008
I created a trendline and associated equation for some data plotted against Time on the x-axis displayed in MM/DD/YY format. The date for the data ranges from 3/27/06 thru 11/10/08.
The trendline equation is…
F(x)=-6E-13x^5+1E-07x^4-.0087*x^3+329.1*x^2-6E+06*x+5E+10
The data actually crosses the y=0 line around 11/5/07, which is the data root
When I use Goal Seek, I got a zero root solution of 28154.98. When I convert this to the date format, it converts to a date in 1981 which is not correct. I tried a range of initial guesses but they all converge to the same number.
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Jan 14, 2009
I am using solver to solve an optimisation problem I have. I need to apply a new solver to every populated row of my sheet. My solver code is as follows:
Sub solverloop()
SolverOk SetCell:="$Z$2", MaxMinVal:=3, ValueOf:="0", ByChange:="$N$2:$O$2"
SolverSolve
End Sub
The code above applies the solver to row 2. My sheet has roughly 500 populated rows. I need to write a macro to loop solver over each row, accept the solution provided by solver, then move to the next row. i would also like to close the loop automatically when the last populated row is reached.
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Nov 2, 2006
I'm trying to run a macro which will allow me to run solver and keep the solution.. I have managed to get the macro to work. However, does anyone knows how I can ensure that solver's solution can be automatically saved without prompting the user whether to save the solution?
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Nov 8, 2006
I am having problems with this excercise on my worksheet in my business computing class. I was wondering if someone could guide me through on how to use the solver feature.
Excercise:
Eve Blue is the manager of Southland Furniture store and she is planning a New Years Day sale. The store has only 75 square feet of space available to display and stock this merchandise. During the sale each folding table costs $5, retails for $11 and takes up two square feet of space. Each chair costs $4, retails for $9 and takes up one square foot of space. You must order at least one chair and one table and, of course, they must be whole units. The maximum amount allocated for purchasing the tables and chairs for the sale is $280. Eve cannot sell more than 40 chairs but the demand for tables is unlimited. Eve asked you to help her determine how many tables and chairs she should purchase in order to make the most profit.
Layout: (I marked in x's where I need to solve.)
TablesChairs
Unit Wholesale Cost $5.00 $4.00
Unit Retail Price $11.00 $9.00
Profit per Unit $6.00 $5.00
Square feet per Unit 2 1
Quantity to Order x x
Total Cost $- $-
Total Profit $- $-
Total Square Footage00
TOTAL ORDER COST $-
TOTAL ORDER PROFIT $-
TOTAL SPACE REQUIRED0
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Mar 23, 2007
At work, we have a spreadsheet that uses SOLVER.XLA in a macro. It works fine in Excel '97 but in Excel 2003 it simply does nothing. The code is
s = Application.LibraryPath & "solversolver.XLA"
On Error Resume Next
Workbooks.Open filename:=s
Application.ExecuteExcel4Macro String:="SOLVER.XLA!SOLVER.RESET()"
Application.ExecuteExcel4Macro String:="SOLVER.XLA!SOLVER.OK( PLOT!R46C4,2,0,(PLOT!R13C12:R14C12))"
Application.ExecuteExcel4Macro String:="SOLVER.XLA!SOLVER.OPTIONS(100,100,0.000001,FALSE,FALSE,2,1,1,0.05,TRUE)"
Application.ExecuteExcel4Macro String:="SOLVER.XLA!SOLVER.OK(PLOT!R46C4,2,0,(PLOT!R13C12:R14C12))"
Application.ExecuteExcel4Macro String:="SOLVER.XLA!SOLVER.SOLVE()"
ActiveSheet. Protect DrawingObjects:=False, Contents:=True, Scenarios _
:=True, password:="sigma"
It gives no error message, it simply does not do the calculations. (I took out the error handling line to make sure that there really were no errors being generated!)
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