1. Computer Science & Engineering 2111
Lecture 1
Spreadsheet Design
CSE 2111 Lecture 1-Spreadsheet Design

2. Location, Location, Location
Spreadsheet design is the most important factor
GIGO
Proper formulas and formatting are also very important
Spreadsheet Organization
Inputs and Outputs on the same worksheet
Inputs and Outputs on separate worksheets
CSE 2111 Lecture 1-Spreadsheet Design

3. CSE 2111 Lecture 1-Spreadsheet Design
Design Tips
Inputs and outputs should be clearly denoted
Inputs and outputs should be set up in such a way as to facilitate creating formulas that can be copied instead of having to be rewritten over and over
Formulas should primarily use cell references instead of “hard coding” the values (Typing a value instead of a cell reference)
CSE 2111 Lecture 1-Spreadsheet Design

4. Inputs and Outputs on Same Worksheet
CSE 2111 Lecture 1-Spreadsheet Design

5. CSE 2111 Lecture 1-Spreadsheet Design
Notice the Design facilitates writing a formula in cell C4 and copying it over to cell E4 and down to cell E6
CSE 2111 Lecture 1-Spreadsheet Design

6. Inputs and Outputs on Separate Worksheets
Worksheet Name: Budget Assumptions
Outputs
Worksheet Name:
College Budget
CSE 2111 Lecture 1-Spreadsheet Design

7. Worksheet Name: College Budget
CSE 2111 Lecture 1-Spreadsheet Design

8. Referencing Multiple Worksheets
Special Characters or spaces in spreadsheet name, the whole name must be surrounded by ‘ ‘.
Type in formula, or point and click
Point and click-Make sure to anchor formula
All cell references will have sheet name, but that is ok.
CSE 2111 Lecture 1-Spreadsheet Design

9. CSE 2111 Lecture 1-Spreadsheet Design
My Outputs
My Inputs
OtherInputs
My Outputs
CSE 2111 Lecture 1-Spreadsheet Design

10. Decision Support Systems (DSS)
Programs used to help managers solve complex business problems
A model representing a quantitative business problem
Problem can range from a desired product mix to sales forecasts to sales analysis to risk analysis
Used to examine financial outcomes using “what if” analysis
Examples of DSS programs
SAP™, Microsoft Dynamics™, and PeopleSoft™
Excel
CSE 2111 Lecture 1-Spreadsheet Design

11. College Town Thrift Shop
Owner of a Thrift shop that caters to college students
Thinking of expanding your business by buying an adjacent store front.
You will need to finance the purchase with a business loan
Bank requires a projection of your profit and cash flows for the next two years before it will loan you the money to expand
CSE 2111 Lecture 1-Spreadsheet Design

12. College Town Thrift Shop
Forecast Factors:
2013 Sales
Cost of Goods Sold
Estimate of the Economy
Recession and High Inflation Outlook
Recession and Low Inflation Outlook
Economic Boom and High Inflation Outlook
Economic Boom and Low Inflation Outlook
Business loan payment
CSE 2111 Lecture 1-Spreadsheet Design

13. CSE 2111 Lecture 1-Spreadsheet Design
Organization of a DSS Model using an Income and Cash Flow Statement Framework
Constants Section
Holds values that are needed for the spreadsheet calculations
Inputs Section
Will be typed in by the user to play basic “what if” analysis
Summary of Key Results Section
Summarizes important information
Calculations Section
Used for intermediate calculations
Income and Cash Flow Statements Section
Financial or accounting “body” of the spreadsheet
CSE 2111 Lecture 1-Spreadsheet Design

14. CSE 2111 Lecture 1-Spreadsheet Design
Steps
Create a skeleton and add any constants
Fill in the easy formulas
Fill in the hard formulas
CSE 2111 Lecture 1-Spreadsheet Design

15. Skeleton of DSS using an Income and Cash Flow Statements framework
CSE 2111 Lecture 1-Spreadsheet Design

16. CSE 2111 Lecture 1-Spreadsheet Design
Constants Section
Values given to you and usually do not change, but can if needed.
For example, you might decide to borrow more than $100,000.
CSE 2111 Lecture 1-Spreadsheet Design

17. CSE 2111 Lecture 1-Spreadsheet Design
Inputs Section
Allows you to play basic “what if” analysis on the factors you have identified earlier
CSE 2111 Lecture 1-Spreadsheet Design

18. Summary of Key Results Section
Summary sections are usually placed near the top of a spreadsheet to allow managers to see a quick “bottom line summary
(Copied from the Income and Cash Flow Statements section at the bottom of the sheet.)
Summary sections can make it easier to select cells for charting
CSE 2111 Lecture 1-Spreadsheet Design

19. Calculations Section (Expansion and No Expansion)
Used to compute intermediate values which makes the calculations in the Income and Cash Flow Statements less complicated.
CSE 2111 Lecture 1-Spreadsheet Design

20. Completed Spreadsheet (Using R/H as input)
CSE 2111 Lecture 1-Spreadsheet Design

21. Evaluating the outcomes for your DSS Model
Recession and High Inflation Outlook
Recession and Low Inflation Outlook
Economic Boom and High Inflation Outlook
Economic Boom and Low Inflation Outlook
You could create 3 more copies of your spreadsheet to evaluate the four different scenarios, or you could use Scenario Manager.
CSE 2111 Lecture 1-Spreadsheet Design

22. CSE 2111 Lecture 1-Spreadsheet Design
Scenario Manager
Used to run the model for all the requested outcomes and presents a tabular summary of the results.
Presents a tabular summary of the results that is useful for reports, presentations, etc.
CSE 2111 Lecture 1-Spreadsheet Design