https://dotwave.app/blog/ Practical guides for freelance analysts on cleaning client data and delivering dashboards faster. en-us Sun, 06 Jul 2026 00:00:00 GMT https://dotwave.app/blog/how-to-clean-messy-excel-data-for-clients.html https://dotwave.app/blog/how-to-clean-messy-excel-data-for-clients.html Sun, 06 Jul 2026 00:00:00 GMT A repeatable workflow to clean a messy client Excel file — Amount column, a real formula, seven steps — before it reaches Power BI or Tableau. https://dotwave.app/blog/data-cleaning-checklist-freelance-analyst.html https://dotwave.app/blog/data-cleaning-checklist-freelance-analyst.html Sun, 06 Jul 2026 00:00:00 GMT A 12-point data cleaning checklist to run on every client dataset, with a real customer-name example that inflates a distinct count. https://dotwave.app/blog/how-to-deliver-client-dashboards-faster.html https://dotwave.app/blog/how-to-deliver-client-dashboards-faster.html Sun, 06 Jul 2026 00:00:00 GMT Cut monthly dashboard delivery from two days to two hours with reusable cleaning, mapping tables, and a real month-key formula. https://dotwave.app/blog/how-to-fix-dates-stored-as-text-in-excel-before-client-delivery.html https://dotwave.app/blog/how-to-fix-dates-stored-as-text-in-excel-before-client-delivery.html Sun, 06 Jul 2026 00:00:00 GMT Dates stored as text sort April before January and break every trend chart. How to spot and convert them in Excel before a client sees it. https://dotwave.app/blog/why-merged-cells-break-every-dashboard.html https://dotwave.app/blog/why-merged-cells-break-every-dashboard.html Sun, 06 Jul 2026 00:00:00 GMT Merged cells leave the value in the top-left and blank everywhere else, so most of your rows import empty. How to unmerge and fill down fast. https://dotwave.app/blog/five-minute-data-quality-check-before-client-report.html https://dotwave.app/blog/five-minute-data-quality-check-before-client-report.html Sun, 06 Jul 2026 00:00:00 GMT Six fast checks that catch the errors clients notice — row counts, a reconciled total, duplicates, blanks, date range, and outliers — in five minutes. https://dotwave.app/blog/how-to-standardize-inconsistent-column-names-across-csv-files.html https://dotwave.app/blog/how-to-standardize-inconsistent-column-names-across-csv-files.html Sun, 06 Jul 2026 00:00:00 GMT When 12 monthly CSVs each spell the header differently, your append makes 40 half-empty columns. Standardize names with a mapping table first. https://dotwave.app/blog/what-to-do-when-client-sends-data-in-four-formats.html https://dotwave.app/blog/what-to-do-when-client-sends-data-in-four-formats.html Sun, 06 Jul 2026 00:00:00 GMT A PDF, a Google Sheet, a six-tab Excel file, and a CSV — all the same dataset, all different. A calm order of operations to get to one clean table. https://dotwave.app/blog/how-to-handle-duplicate-rows-without-writing-a-formula.html https://dotwave.app/blog/how-to-handle-duplicate-rows-without-writing-a-formula.html Sun, 06 Jul 2026 00:00:00 GMT Duplicate rows inflate every total. How to find and remove them with conditional formatting and Remove Duplicates — no formula required. https://dotwave.app/blog/how-to-clean-inconsistent-category-names-in-survey-data.html https://dotwave.app/blog/how-to-clean-inconsistent-category-names-in-survey-data.html Sun, 06 Jul 2026 00:00:00 GMT Survey fields turn eight real categories into thirty. How to group them back with a mapping table you can defend. https://dotwave.app/blog/why-freelance-analysts-undercharge-for-data-cleaning.html https://dotwave.app/blog/why-freelance-analysts-undercharge-for-data-cleaning.html Sun, 06 Jul 2026 00:00:00 GMT You quote for the dashboard and give the cleaning away free. The math on what that costs you, and four ways to bill for the invisible work. https://dotwave.app/blog/how-to-scope-a-data-cleaning-project-to-get-paid.html https://dotwave.app/blog/how-to-scope-a-data-cleaning-project-to-get-paid.html Sun, 06 Jul 2026 00:00:00 GMT "Can you just clean this up?" is how cleaning projects lose money. A scope with row counts, named deliverables, and a change-request rate that gets you paid. https://dotwave.app/blog/the-hidden-hours-in-every-fixed-price-analytics-project.html https://dotwave.app/blog/the-hidden-hours-in-every-fixed-price-analytics-project.html Tue, 07 Jul 2026 00:00:00 GMT A fixed-price project quoted at 15 hours quietly costs 27. Where the hidden 12 go — data chasing, version churn, revisions — and how to price them in. https://dotwave.app/blog/what-to-include-in-a-client-data-delivery-report.html https://dotwave.app/blog/what-to-include-in-a-client-data-delivery-report.html Tue, 07 Jul 2026 00:00:00 GMT A delivery report is what lets a client defend your numbers in a meeting you're not in. The six sections to include, with a filled-in template you can copy. https://dotwave.app/blog/how-to-handle-missing-values-before-building-a-dashboard.html https://dotwave.app/blog/how-to-handle-missing-values-before-building-a-dashboard.html Tue, 07 Jul 2026 00:00:00 GMT A blank is not a zero, and treating it as one skews every average. How to decide what missing means per column and handle it before you build a dashboard. https://dotwave.app/blog/currency-formats-from-multiple-countries-cleaning-guide.html https://dotwave.app/blog/currency-formats-from-multiple-countries-cleaning-guide.html Tue, 07 Jul 2026 00:00:00 GMT 1.234,56 and 1,234.56 are the same amount stored two ways, and a naive SUM gets both wrong. A guide to cleaning multi-country currency data before you report. https://dotwave.app/blog/how-to-validate-client-data-before-you-start-building.html https://dotwave.app/blog/how-to-validate-client-data-before-you-start-building.html Tue, 07 Jul 2026 00:00:00 GMT Three hours into a build you discover the join key doesn't match and the dashboard is impossible. Five checks that prove the data fits before you invest time. https://dotwave.app/blog/data-cleaning-vs-data-transformation-what-the-difference-costs.html https://dotwave.app/blog/data-cleaning-vs-data-transformation-what-the-difference-costs.html Tue, 07 Jul 2026 00:00:00 GMT Cleaning is bounded; transformation is open-ended. Quoting them as one line is how a two-hour job becomes ten. How to tell them apart and price each. https://dotwave.app/blog/how-to-automate-repetitive-cleaning-tasks-for-recurring-clients.html https://dotwave.app/blog/how-to-automate-repetitive-cleaning-tasks-for-recurring-clients.html Tue, 07 Jul 2026 00:00:00 GMT If you re-clean the same monthly file by hand, you're spending 18 hours a year on identical clicks. How to build the pipeline once and refresh it in minutes. https://dotwave.app/blog/data-handoff-checklist-every-freelance-analyst-needs.html https://dotwave.app/blog/data-handoff-checklist-every-freelance-analyst-needs.html Tue, 07 Jul 2026 00:00:00 GMT A project ends and two months later the client asks how to refresh it. A handoff checklist that leaves the work runnable without you — and protects the referral.