acis 1504 - introduction to data analytics & business intelligence verifiabilit y
TRANSCRIPT
ACIS 1504 - Introduction to Data Analytics & Business Intelligence
Verifiability
Business Intelligence
Quality Information
FunctionsSDLCDesign• Spreadsheet*• Database
Data Analytics
E-commerceBig Data*Methods• Data Mining*• Text Mining*• OLAP*• Visualization*• Query
Database
Benefits Components
Implement with:* Excel Access PowerPoint
Concept Map
Data Analytics
Implementation
Verifiability
Design
Data Validation
ProtectionDocumentation
Objectives
• Explain the Verifiability Design Goal.
• Demonstrate Excel features often used to support verifiability.
Segment A:Verifiability
Answers From Big Data
https://www.youtube.com/watch?v=LrNlZ7-SMPk
• 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 ExampleOpen the Nashville Hotels spreadsheet we worked with last class.
Add appropriate documentation including:• Sheet Name
• Headers and Footers
• Comments
Segment C:Data Validation
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
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 ExampleSelect 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.