Jan-Herman Koller
2026-08-11
Distributed by:
JHK

Issued to

Jan-Herman Koller

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Credential Verification

Issue date: August 11, 2026

ID: 9ad9519a-b23c-4c5c-b431-e047949ec23d

Issued by

Data Booster

Type

Certification

Level

Foundational

Format

Online

Description

Holders can read the charts they meet daily; KPIs in context, bar charts for comparison, line charts for trends and seasonality and turn one into a single sentence that supports a decision. They can also spot a misleading chart: a truncated axis, a cherry-picked timeframe, or a comparison that is not like for like.

Skills

Reading data visualizations

Interpreting visualizations

Data Visualization

OKRs and KPIs

Data Storytelling