Case Study: Wer Liefert Was (wlw) achieves automated reporting and a single source of truth, saving ~8 person‑days/month with Tableau Software

“wer liefert was” simplifies reporting across departments

wer liefert was (wlw) is the leading B2B marketplace in Germany, Austria and Switzerland, serving about 13 million monthly visitors and listing roughly 540,000 suppliers. The company faced slow, error‑prone weekly reporting and a growing backlog of ad‑hoc requests—data had to be pulled from an Oracle warehouse, manually processed in Excel and emailed as PDFs—so wlw needed to modernize its BI architecture to automate reporting, reduce errors and enable departmental self‑service.

wlw implemented Tableau Desktop and Tableau Server (with short consultancy support from The Information Lab) to create interactive dashboards tied to its data vault. Reports are now automated and available on demand, producing a single source of truth, reducing manual effort (saving roughly eight person‑days per month and several hours per weekly report), improving data quality and ad‑hoc analysis, and freeing the BI team to focus on advanced analytics and broader self‑service rollout.

Wer Liefert Was

Leif Hitzschke

Head of Business Intelligence