Data Visualization for Oracle BI 12c and Visual...
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Data Visualization for Oracle BI 12c and Visual Analyzer
Tim Vlamis
Thursday, December 7, 2017
New York Oracle User Group Conference
@VlamisSoftware
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Vlamis Software Solutions
▪ Vlamis Software founded in 1992 in Kansas City, Missouri
▪ Developed 200+ Oracle BI and analytics systems
▪ Specializes in Oracle-based:▪ Enterprise Business Intelligence▪ Data Warehousing▪ Data Mining and Predictive Analytics▪ Data Visualization
▪ Multiple Oracle ACEs, consultants average 15+ years
▪ www.vlamis.com (blog, papers, newsletters, services)
▪ Co-authors of book “Data Visualization for OBI 11g”
▪ Co-author of book “Oracle Essbase & Oracle OLAP”
▪ Oracle University Partner
▪ Oracle Gold Partner
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Tim Vlamis Background
Tim Vlamis – Vice President & Analytics Strategist
▪ 30+ years in business modeling and valuation, forecasting, and scenario analyses
▪ Oracle ACE
▪ Instructor for Oracle University’s Data Mining Techniques and Oracle R Enterprise Essentials Courses
▪ Professional Certified Marketer (PCM) from AMA
▪ MBA Kellogg School of Management (Northwestern University)
▪ BA Economics Yale University
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Agenda
▪BI Exploring vs Explanation
▪Human cognition and data visualization
▪Dashboard best practices
▪Discovery scenarios and frameworks
▪Using Visual Analyzer to discover data insights
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Main Uses of BI Systems
Exploration Explanation
xkcd.com
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Many BI Tools Can Make Beautiful Results
Copyright © 2015, Vlamis Software Solutions,
Many BI Systems Can Create Beautiful Results
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OBIEE Operates at a Different ScaleOBI Operates at a Different Scale
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Ingredients Data Quality & Variety
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Technique Data Processing & Prep
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Presentation Data Visualization
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The Principles of Human Cognition Should Guide BI Visualization Design
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Classic Optical Illusions
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Which Soldier is Tallest
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Graphs and Tables
▪ Graphs and Charts depict visual representations and relationships
▪ Tables show data organized for lookup of specific, precise values or items.
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Characteristics of Tables
▪Can present data at drastically different scales.
▪Can present very different data types simultaneously.
▪Can repeat and include multiple sets of the same data values.
▪Are extraordinarily dense and include numerous data relationships without direct distortion of the data itself.
▪ Tables can present “federated” data from different sources in a single simultaneous view.
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Keys to Effective Tables
▪ Prefer smaller tables
▪ Words are important▪ Enable roll overs for meta data for commonly used tables▪ Write informative titles for tables and column head descriptions
▪ Make tables clean and easy to read▪ Eliminate unnecessary gridlines▪ Use space (padding) to create groups of data▪ Left justify text cells and Right justify numerical cells
▪ Make numbers easy to read and understand▪ Judiciously use conditional formatting▪ Avoid putting text in color▪ Align the decimal point for numerical cells▪ Use symbols to denote units of measure (%, $, etc.)
▪ Enable column and row sorting
▪ Avoid scrolling (if possible)
▪ Be transparent about data selection
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Keys to Effective Tables
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Pivot Table “Needs” Sentence
I want to see fact/measure (specifies cell values)
by dimension and dimension (defines rows)
across dimension and dimension (defines columns).
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Pivot Table “Needs” Sentence
I want to see Sales (specifies cell values)
by Product Type and Company (defines rows)
across Market Segments (defines columns).
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7 Keys to Effective Graphs
▪Do not use 3-D effects.
▪Avoid “stop light” color palette.
▪Prefer pastel color palettes and avoid bright colors.
▪Eliminate gridlines, drop shadows, and other graphics.
▪Enable interaction for “exploration” graphs.
▪Prioritize a single message for “explanation” graphs.
▪Above all else, show the data!
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Line Graph
▪Show a pattern or progression over a continuous range.
▪Can be valued within a range to highlight a particular pattern (careful!).
▪Maintain a rectangular shape close to golden proportion.
▪Use scale marker lines and ranges for context.
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Line Graph
▪Use darker versions of standard colors.
▪Eliminate grid lines.
▪Use zoom function for detailed line graphs.
▪Choose curved lines to smooth overall shape.
▪Choose stepped lines to emphasize point transitions.
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Bar Graphs
▪Show nominal data values in comparison to one another.
▪Start with zero.
▪ If use a logarithmic scale, clearly notate.
▪ Think through sort order carefully.
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Bar Graphs
▪Add data labels as interactive rollover.
▪Balance colors.
▪ If change is most important, graph change.
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Stacked Bar Chart
▪Somewhat confusing, not great for representing change.
▪ Total is most clearly represented number.
▪ Typically stack with largest values on the bottom.
▪Single scale can make for interesting intra-bar comparisons.
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Pie Charts
▪ Typically used for showing parts of whole by percentage.
▪ Not great for piece to piece comparisons.
▪ Limit number of pieces.
▪ Can be interesting to show many pies together if significant differences exist.
▪ Stephen Few hates them.
▪ Do not use 3-D.
Prod A
Prod B
Prod C
Prod D
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Scatter Plot
▪Shows single data points at the intersection of two values.
▪Often depict a large number of discrete data points (hundreds or thousands).
▪Useful comparisons of two variables.
▪ Trend lines are often added.
▪Clearly notate if use logarithmic scale(s).
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Bubble Chart
▪ Special type of scatter plot.
▪ Size of bubble is related to a third variable.
▪ Color is related to a fourth variable.
▪ Reduces number of points that can be depicted.
▪ Best for depicting approximate values and comparisons.
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ColorBrewer2.org
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i want hue
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Dashboard Definition
A Dashboard is a visual presentation of current summary information needed to manage and guide an organization or activity.
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BI Dashboards are Different
▪No mechanical systems needed to move indicators.
▪Decisions are not typically made on a second-to-second basis.
▪BI dashboards are not primarily single situation or single person devices.
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BI Dashboards
▪Role-based.
▪Data selection and filtering are extremely important.
▪Dashboards support evidenced-based decision making.
▪Shared understanding of business situation is a key benefit.
▪Content may be individualized.
▪Design should be standardized.
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OBIEE Dashboard Overview
▪Designed with columns and sections (containers).
▪Presentation server is often separate from BI server.
▪Dashboards are web-based and are viewed with browsers.
▪HTML, XML, and Java coding skills are useful, but not required.
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Dashboard Principles
▪Promote user interactivity▪ Prompts▪ View and column selectors▪ Hierarchical column drills▪ Column sorts▪ Guided navigation and action links
▪Promote data transparency▪ Prompts▪ Filter views▪ Narrative views▪ Master detail linking
▪Establish design guidelines for consistency
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OBIEE Demo Content from Chap 1
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Data Visualization Scenarios
Data Discovery
BI Dashboards
Situational Awareness
Alerts Thresholds
Individual Organizational
Immediate Response
Deliberative Response
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Discovery - Explore vs Pioneer
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True Discovery
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Data Discovery Sequence
▪ “Skim” the entire data set to get a sense of its size and scope
▪ “Read” the data set a second time more carefully▪ Identify facts/measures▪ Transaction/event records included?▪ Identify major dimensions
▪Make a list of potentially important or interesting business issues/implications
▪Compare your original business issues with your new list
▪Apply useful frameworks
▪ Transform data and add new data
▪Apply useful frameworks
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Understanding Measures for Exploration
▪Aggregation method is important
▪ If use average, also add a bucketed measure
▪Compute differences
▪Understand data’s natural distribution shapes▪ Normal distributions (bell shaped)
▪ Log-normal distributions
▪ Exponential distributions
▪Average has strong meaning only for normal distributions
▪Outlier identification & treatment are important for non-normal distributions
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Demo
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Rules & Frameworks Promote Creativity
▪Shakespearean/English Sonnet▪ There are exactly 14 lines
▪ It is written in Iambic Pentameter
▪ Three quatrains followed by a couplet
▪ The rhyming scheme is abab, cdcd, efef, gg.
▪Haiku ▪ There are just Three lines
▪ With Seventeen syllables
▪ Five, Seven, and Five
▪Road Runner Rules
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An Example Useful Framework
Position Analysis Performance Analysis Flow Analysis
static period of time period of time
descriptive results change in single asset/resource
relative/comparative fixed vs. variable sources and uses
balance sheet P&L cash flow
strength/weakness bottom line/zero based change over time
portrait motion picture narrative
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Position Analysis
Measure/Fact
Attributes
Time Period
Bar ChartScatter PlotTreemap
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Performance Analysis
Measure/Fact
Attributes
Time Period
Bar ChartScatter PlotLine ChartArea ChartTrellis
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Flow Analysis
Measure/Fact
Attributes
Time Period
Line ChartArea ChartTrellisWaterfall
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Well Established Frameworks
▪Key Performance Indicator (KPI) Development (business)
▪Root cause analysis (science)
▪Diagnostic analytics (science)
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Dimensional Columns
Lowest Grain
Trend/cycle
Correlation
Outlier
Trellis
Comparative
Correlation
Flat Shaped
Low number of factors/cardinality
High number of factors/cardinality
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Demo
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Keys to Data Discovery
▪ Identify your main topic of interest with a performance tile
▪Summary
▪Evaluating a fact or a dimension?▪ Sales analysis▪ Customer or product analysis
▪ Fact analysis▪ Find lowest grain▪ Flat low distribution▪ Event or transaction
▪ Look for clustered distribution▪ Scatter with points as event in fact table
▪ Set fact on X axis and response variable on Y axis
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Major Types and Uses of Graphs
▪Scatter plot – outlier detection
▪ Line graph – time based measures. Looking for trends and patterns
▪Bar graph – comparison analysis
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Starting with Data Discovery
▪Begin either with a specific question or a framework
▪Avoid “wandering around”
▪Most of your visualizations will not produce new insights
▪Move quickly through visualizations
▪Be prepared to open a lot of browser tabs
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Finding is not Explaining
▪Process of interaction has a huge impact on the contextual
understanding of an insight
▪When someone discovers something, they believe it more
▪Human Cognition Biases
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Drawing for Free Book
Add business card to basket
or fill out card
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Analytics and Data SummitAll Analytics. All Data. No Nonsense.
March 20 – 22, 2018
Formerly called the BIWA Summit with the Spatial and Graph SummitSame great technical content…new name!
www.AnalyticsandDataSummit.orgCall for speakers is now open with rolling acceptances until December 3, 2017
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Questions?
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Thank You!
Data Visualization Best Practices for
Oracle Business Intelligence
Tim Vlamis
www.vlamis.com
@TimVlamis
@VlamisSoftware