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Spider Charts Collin Ferre1

Supply Chain Management

 

Spider Chartsalso known as Radar Charts

By Collin Ferre

BusM 361

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Spider Charts

•

What is a Spider\Radar Chart?

• How is it used?

• Exercises

• Additional Resources

0

20

40

60

80Caffine

Sodium

Calories

Total Carbs

Sugar

Protein

Soda A Soda B Soda C

Soda D Soda E

Not actual data

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Background

Spider charts are most useful when trying tocompare different set of data that all relateto a certain point.

They are very useful in visual comparisons ofdata to help choose the optimal solution oridentify areas of improvement.

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How to use it

• Create categories

• Standardize performance definitions

• Rate each performance category

• Construct the chart

• Plot the ratings.

• Interpret and use the results. 

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Using Excel – Example One

•

Suppose that you are looking to buy acomputer

• Your top three criteria for the computer arehard drive capacity, processor speed,amount of RAM (memory), and CD\DVDdrive.

• Use a spider chart to help you choose thebest option for your computer

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Using Excel – Example One

• You have chosenthree systems

Brand A Brand B Brand C

HardDrive

60 GB 80 GB 40 GB

Processor

Speed

3.6 MHz 2.6 MHz 3.2 MHz

RAM 512 MB 1024 MB 512 MB

CD/DVD DVD DVD CD

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Using Excel – Example One

• In this example we will create a 1-10scale to rate each aspect of thecomputer

• We will assume that the on the scalethat – 80 GB hard drive is a 10 – a 20 GB is a 1

 – 3.6 MHz processor is a 10 – a 1.6 MHz is a 1

 – 1024 MB Ram is a 10 – a 128 MB is 1

 – DVD is a 10 - no CD/DVD is a 0 

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Using Excel – Example One

• Input the data fromthe table into an excelspreadsheet

• Now we can use theChart wizard to create

a spider chart.

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Using Excel – Example One

Step 2: A window like this will

appear chose radar and clicknext

Step 1: Select Insert from themenu bar and then chooseChart

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Using Excel – Example One

Step 4: Click next and add a name tothe chart.

At this point you can also change fontcolors or the position attributes of thelegend.

Step 3: Enter the data range byselecting the fields with the ratingsof the different components

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Using Excel – Example OneStep 5: After you have changed

the colors and other attributes thatyou would like Click Finish

You should have a chart that looks

similar to the one on the right.

Now you have a graphicalrepresentation of the choice that

you are making. This graph canhelp you see which option bestmeets your needs.

Computer Choices

0

5

10Hard drive

Processor speed

RAM

CD/DVD

Brand A Brand B Brand C

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Example Two -

• Take a look at a more complexsituation and this time you are on yourown to create the spider chart.

• In this example it will not be necessaryto rate the different components,

simply use the data given in theproblem

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Example Two

Month Average temp in

HonoluluAverage temp in

LondonAverage temp in

Anchorage

January 64 19 -10

February 68 30 5

March 70 56 20

April 72 67 35

May 74 72 45

June 78 76 55

July 80 87 60

August 86 84 65

September 79 79 63

October 75 68 57

November 70 55 35

December 68 28 25

Fred is looking for a newplace to open a tourist shop.

One of the main criteria for

the shop is the averagetemperature during the year.He would like to compare thetemperature in 3 cities

Create a Spider Chart to helpFred with his decision.

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Answer to Example Two

Average temperature comparison

-200

2040

6080

100January

February

March

April

May

JuneJuly

August

September

October

November

December

Average temp in Honolulu

Average temp in London

Average temp in Anchorage

One Possible answerto example 2.

If Fred is looking forthe best temperatureyear round which citywould he choose?

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Applying the Principle

• Think of your areas of responsibility

• How could you use a Spider Chart in yourwork to help you make a better decision?

• How could a Spider Chart help you optimizeperformance?

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 Additional Resources… • http://www.crummer.rollins.edu/journal/articles/2003_2_radar.pdf 

• http://www.mori.com/pubinfo/aiz/statistical-analyses.pdf 

• http://www.skymark.com/resources/tools/radar_charts.asp  

• http://www.internet4classrooms.com/excel_radar.htm  

• http://web2.concordia.ca/Quality/tools/23radar.pdf  

• http://www.isixsigma.com/dictionary/Radar_Chart-307.htm 

• http://www.infinitefutures.com/essays/prez/mapping/  

• http://office.microsoft.com/en-us/assistance/HA010346071033.aspx 

• http://www.ve.com/kavachart/alacarte/applets/specialty/SpiderCharts.html