This series of cases (see also the A [UVA-E-0107], B [UVA-E-0108], D [UVA-E-0110], and E [UVA-E-0147] cases) takes students through five design-and-manufacturing decisions confronting Albin Kalin, managing director of Rohner Textil AG, a textiles manufacturer in northeastern Switzerland. In the C case, Rohner's dyemaster substitutes another dye for the dye Rohner is currently using for its compostable-fabric project. The substituted dye is cheaper and poses no environmental threat. The dyemaster, however, did not inform Kalin before making the change, nor did he get approval from the EPEA, an independent organization that evaluates Rohner's environmental protocols.