The Warstein-based family company WESTKALK (Fig. 1) celebrated its fourth anniversary in December 2010. On 07.12.2006 the old-established Warstein-based family-owned enterprises Weiken, Koster and Risse were merged into the company WESTKALK GmbH & Co. KG. The management including Franz-Bernd Koster and Raymund Risse reported very positive results (Fig. 2). Despite a reduction of the amount of limestone extracted, the turnover remained stable and productivity could clearly be improved by optimizing the logistical processes.
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