ACIS Introduction to Data Analytics & Business Intelligence Verifiabilit y

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Concept Map Data Analytics Implementation Verifiability Design Data Validation Protection Documentation

Objectives Explain the Verifiability Design Goal. Demonstrate Excel features often used to support verifiability.

Segment A: Verifiability

Answers From Big Data Data Agents Unstructured New Talent New Way of Thinking Opportunity

Spreadsheet Design Goals 1.Simplicity 2.Clarity 3.Verifiability 4.Accuracy 5.Efficiency

Verifiability Easy to understand Minimize erroneous data entry

Segment B: Understandability

Titles

Rename Worksheet Double-click sheet tab to change text

Headers & Footers

Comments

Range Names

Documentation Worksheet

Document Nashville Hotels Example Open the Nashville Hotels spreadsheet we worked with last class. Add appropriate documentation including: Sheet Name Headers and Footers Comments

Segment C: Data Validation

Define rules to limit data entry to reasonable values.

1.Which data cells may require data validation? 2.What rules can I establish to identify incorrect data? 3.Is this rule accurate 100% of the time? 4.What should my error message be? Data Validation Decisions

Data Validation Error Message

Data Validation First, select data range.

Enrollment Data Validation Example ACIS 1504 is usually capped at 2 sections of 500 per semester. Sometimes a few extra students are added to a section but that is rare. Apply data validation to the Enrollment worksheet to limit the entry a erroneous enrollment figures. Apply data validation to the Grades worksheet to ensure that each student is entered as a Freshman, Sophomore, Junior or Senior.

Hotel Data Validation Example Add Data Validation to the Nashville Hotels worksheet to ensure that a reasonable value is entered for the ROOMS field. Limit the PRICE field to the following entries: Budget, Economy, Midprice, Upscale, Luxury.

Segment D: Worksheet Protection

Restricts entry into cells containing headings and calculations.

1.Which cells require protection? 2.Which cells need to be unlocked? Worksheet Protection Decisions

Worksheet Protection Error Message

Worksheet Protection (Step 1)

Worksheet Protection (Step 2)

Enrollment Protection Example Setup the Enrollment worksheet so that only enrollment figures can be modified.

Hotel Protection Example Select Sheet 2 of the Nashville Hotels workbook. Assume that you may want to add new hotel information in the future. You may want to add another property to an existing hotel entry or you may need to add a completely new chain. Setup worksheet protection.