A weak opening
“I analyzed data and made a dashboard.” This gives no question, source, inclusion rule or independently checkable result.
A stronger opening
“In a fictional eight-order retail extract, I compared completed order value across April and May, reconciled excluded cancellations and documented a EUR100 observed increase.”
Why the stronger version works
It names the scope, independent work, method and evidence boundary. It does not claim a real employer, client impact or an outcome outside the extract.
Suggested repository structure
README with question and reproduction commands; data with dictionary and permissions; src with your implementation; tests with expected totals; outputs with chart/table and decision note. Keep answer keys separate from your own attempt.
Evidence to annotate
8 source orders, 6 completed, 2 cancelled; completed sales EUR700. April 300, May 400; change 100 /33.3%. Store 370,Web 330; AOV116.67. Explain why each validation exists. Include one failed check you investigated and how you resolved it, rather than hiding all intermediate problems.
Your independent task
Reproduce the analysis yourself, then add a documented extension or alternative presentation. Credit the original fixture and explain your contribution. Do not infer profit, customer retention or campaign effects: these fields are absent.
Career note
Portfolio examples and resume guidance do not guarantee interviews or a job. Use your own verified work; do not copy the sample as commercial experience.
Try the activity before reading its reference. Keep your sources, commands and assumptions with your work. Companion activities are unsaved self-practice and do not award a certificate or change lesson progress.