Spreadsheet Models for Managers

Getting Access to Spreadsheet Models for Managers

If Spreadsheet Models for Managersyou use Excel to model businesses, business processes, or business transactions, this course will change your life. You’ll learn how to create tools for yourself that will amaze even you. Unrestricted use of this material is available in two ways.

As a stand-alone Web site
It resides on your computer, and you can use it anywhere. No need for Internet access.
At this Web site
If you have access to the Internet whenever you want to view this material, you can purchase on-line access. Unlimited usage. I’m constantly making improvements and you’ll get them as soon as they’re available.

To Order On Line

Order "Spreadsheet Models for Managers, on-line edition, one month" by credit card, for USD 69.95 each, using our secure server, and receive download instructions by return email.
Order "Spreadsheet Models for Managers, on-line edition, three months" by credit card, for USD 199.00 each, using our secure server, and receive download instructions by return email.
Order "Spreadsheet Models for Managers, downloadable hyperbook edition" by credit card, for USD 199.00 each, using our secure server, and receive download instructions by return email.

To Order by Mail

Make your check payable to Chaco Canyon Consulting, for the amount indicated:
  • For the download: USD 199.00
  • For access online for three months: USD 199.00
  • For access online for one month: USD 69.95
And send it to:
Chaco Canyon Consulting
700 Huron Avenue, Suite 19C
Cambridge, MA 02138

To use the course software you’ll need some other applications, which you very probably already have. By placing your order, you’re confirming that you have the software you need, as described on this site.

Spreadsheet Models for Managers

Implementation 2/4
Session Links
  • When we decompose (analyze) we ask:
    • What are the components of the whole system with respect to a particular way of breaking it up?
    • Example: Divide work force into categories, and ask how much of each kind of office furniture is needed in each category
  • When we recombine (synthesize) we ask:
    • What is the total composition of the system, given the parts?
    • Example: If we know how much office furniture is required for each category of employee, and we know how many employees we have in each category, we can roll up the total office furniture spectrum
  • Analysis and Synthesis are best implemented using Excel arrays

A prism analyzing white
	lightA common question is “How do I know how to break up the problem? Is there only one way to do the analysis?” The answer is that breaking up a problem is an art, and there is usually more than one way to do it. The art of picking a good way takes a while to learn.

Often you want to break up the problem along one set of boundaries for one purpose and along another set for another purpose. You might want this if the calculations you’re making are especially easy if the problem is analyzed in a certain way. So there is often no single right answer to the analysis question.

Array arithmetic in Excel is one of its more powerful capabilities. It’s a way of doing computations on whole ranges of cells at once, rather than cell-by-cell as most spreadsheet users do them. It takes a bit of effort to grasp it, but once you have it you’ll feel pretty good about it. We’ll see several examples of its use in this session and the next one.

The photo shows a prism decomposing (analyzing) white light into its component colors.

Last Modified: Wednesday, 27-Apr-2016 04:15:26 EDT

Matrix Multiplication and Array Arithmetic

For many of you, matrix multiplication and array arithmetic are new ideas. It’s easy to get lost in the details of how they work and then forget about why we use them.

To keep a clear view of the forest and avoid focusing only on the trees, remember why we use matrix multiplication and array arithmetic. Briefly, we use them because we find that it’s very often helpful to decompose a problem into parts (analysis), then do calculations on the parts, and finally reassemble the final solution from the results of those partial calculations (synthesis).

Matrix multiplication and array arithmetic provide us with very convenient methods for performing those intermediate calculations on the parts. They’re the tools that make analysis and synthesis so powerful.