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Red Balls of Fire

Bernard Kilonzo

Bernard Kilonzo

Admin

Lead Analytics Consultant

Join date: Dec 13, 2019

Bernard is a senior data analytics consultant based in Kenya with expertise in data analytics and visualization using Tableau, Power BI, and Shiny.

Bernard runs a remote-first data analytics and visualization consultancy firm Rigor Data Solutions. He spends much of his time helping clients design, develop, and deploy solutions that extract valuable insights. He has extensive experience in data analytics consulting, where he has successfully developed solutions for clients such as UNFPA, Social Impact, Day for Girls International, Evidence Action etc. Bernard is a 3X Tableau certified expert and has an undergraduate degree in Mathematics from Egerton University.

Outside work, Bernard loves watching medieval series, enjoys adventure travel, and orchard farming.

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Related Reading (490)

Oct 3, 2026 ∙ 3 min

Tableau Relationships vs Joins: Choosing the Right Data Model

Overview As modern analytics teams work with increasingly diverse and multi‑grain datasets, the choice between using relationships or joins in Tableau has become a central design decision. Each approach shapes how data behaves once it reaches the worksheet - affecting aggregation accuracy, flexibility across dashboards, and the overall reliability of insights. While both methods allow you to bring multiple tables together, they operate in fundamentally different ways that influence how...

Sep 26, 2026 ∙ 2 min

How to Export Power BI Data to Excel

Overview Exporting data from Power BI to Excel is a core task for analysts who need to share tables, perform deeper ad‑hoc analysis, or integrate Power BI outputs into existing spreadsheet workflows. Because Excel remains central in many organizations, being able to move data cleanly from Power BI ensures that insights produced in Desktop can be reused for modelling, reporting, or operational decision‑making. This article focuses only on the export methods available in Power BI Desktop. It...

Sep 19, 2026 ∙ 2 min

Custom Number Formatting in Power BI

Overview Custom number formatting gives you precise control over how numbers appear across your reports, letting you go far beyond the default currency, percentage, and decimal settings. At its core, it allows you to define formatting strings - using symbols like #, 0, commas for scaling, decimals, and even literal text - to shape how values display in visuals. Power BI supports custom formats at three hierarchical levels: model, visual, and element, with higher levels overriding lower ones....

Sep 12, 2026 ∙ 2 min

Custom Number Formatting in Tableau

Overview Tableau custom number formatting lets you control exactly how a field’s values appear in every worksheet without writing any calculated fields. Instead of transforming the data, you define a display‑only formatting pattern that Tableau applies consistently wherever that field is used. This includes specifying decimal precision, thousands separators, scaling (K, M, B), prefixes or suffixes, and even literal text. Because it’s set at the field level, it ensures uniform presentation...

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