Computing Erlang C Formula Within Excel With No Addin?
Jan 5, 2012
I am trying to set up a spreadsheet that will have a calculator where variables can be modified in order to properly see staffing requirements using the Erlang C formula. I have all of the known variables, but I can't seem to figure out how to calculate the formula to get the numbers I'm expecting.
[URL] is the website I'm using currently, and I'm stuck at the actual Erlang C formula. I'm not very good at math, but here is how I am reading the formula in English (I'm using the given numbers on the site for the variables so I can check my work).
Erlang C = calls per second to the power of agents staffed divided by the factorial of agents staffed. The result is then divided by calls per second to the power of agents staffed divided by the factorial of agents staffed again, that result is added to 1 minus occupancy, that result is multiplied by the summation of 0 to 54 (54 being the result of 55 agents staffed minus 1), which is then multiplied by calls per second to the power of "k" (i haven't yet figured out what k should equal, i assumed zero from the summation) divided by the factorial "k".
The result I get is not even close to what the website shows as the answer for Erlang, which should be .239. Am I making faulty assumptions anywhere? It's entirely possible I'm not computing the formula properly, it's been about 12 years since I've taken a math class, but since I know all the values for the variables (except for "k"), I should be able to write out a simple Excel formula to compute this.
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May 11, 2007
determining a formula to compute a sales commission.
Here is a sales scenario.
A $25 commission will be paid on sales between $50 to $150.
A $50 commission will be paid on sales between $151 to $300
A $75 commission will be paid on sales between $301 to $600
The sales person will enter the sale amount into column B. Column C should compute the total commission for multilple sales.
Example:
Column A Column B
Sales Commission
$50 $150 (which is the comm. for the combined sales)
$175
$360
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So I suppose the query is three fold.
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The "O033116" is where I will need a search completed to obtain the user id.
The addin is called ServiceCredt.xla
3, Activate the installed addin.
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That way, everyone will be working with the server version of the addin, and any time I want to roll out an updated version I just place a new addin file on the server. The next time the users restart Excel, the new version is loaded.
Except users never follow directions and some of them click the default 'Yes' when asked and get a local copy of the addin and never receive updated versions of the addin.
How do I disable the "Copy Addin" question completely? I don't want to depend on the user. I know this is possible because I have this 3rd party addin that we use that is installed from c:Program Files and it just stays there and you're never asked to copy the addin when you install it in Excel.
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Apr 23, 2012
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Jan 10, 2013
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Code:
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This call causes the error message "runtime error 91: object variable or with block variable not set".
This problems came up with providing an existing Excel2003-AddIn for Excel 2010.
The same code runs in following cases:
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2. call a function in an Excel2003-AddIn (.xla) from a Excel2010-AddIn (.xlam)
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Feb 18, 2014
My spreadsheet opens. Cell A1 determines what today is, formatted as "weekday, day month year" (e.g., "Tuesday, 18 February 2014").
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What formula or step(s) to follow to render this value automatically?
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Nov 26, 2009
Using Excel 2003, Column E has a varying and unpredictable number of rows, which only the final 252 rows are of significance. I need to compute the following formulas, here written in English as I can't determine the proper terminology to accomplish this task in Excel:
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Final Row with a number in Column E/average (final 126 rows with numbers in column E)+
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I attach the excel file : Price_Time_Series.xlsx
In this xls file, you can find dates in column A, price in column B and returns in column C.
I want to compute standard deviation at the end of the month for stock returns (column C), by considering all available days.
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I have found an addin (http://www.quantdec.com/Excel/smoothing.htm) that adds a worksheet function smoothing data. It operates with 2 arguments:
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It outputs a matrix of smoothed results, and therefore requires the Ctrl-Shift-Enter on a spreadsheet. Until there no problem, the function works properly. However I need to repeat the process about 100 times. Therefore I extended my ranges to duplicate the calculations, and that also worked fine. But because I don't need the intermediate data (100 columns by 1000+ rows) and I don't like to wait 2 minutes for the calculations to finish each time I open the saved file again, I thought I could just use VBA and only output the final results.
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I have tried an example I found somewhere using a built-in Excel Worksheet function MMult and it worked with ranges:
Sub SomeSub()
Dim xArray As Variant, yArray As Variant, zArray As Variant
Dim Fn As Object
Set Fn = Application.WorksheetFunction
xArray = Range("A1:B2").Value
yArray = Range("D1:E2").Value
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ActiveCell.Resize(2, 2).Value = zArray
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On Error Resume Next
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On Error Resume Next
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Sub namesdeleteall()
Dim intConfirm As Boolean
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When I Step through (Using the f8 Key) the below code -- Comments Explain my problem/Question
Code:
Sub SetUpTable()
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'Module marked as Volitile
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[Code]....
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