57 sigmaGary Thomas, Director of Continuous Improvement and Operational Risk Management for HJ Heinz, tells Martin Ashcroft how lean and six sigma are being used to step change performance. ÔÇ£We think we are truly an innovator in the food business,ÔÇØ says Gary Thomas, and heÔÇÖs not talking about the 57 varieties, the stay-clean caps or the upside-down bottles.