With stagnant volumes and volatility in costs putting pressure on margins, more companies are turning their attention to supply chains to eke out savings. But other changes in the market, not least shopper promiscuity and the rise of non-traditional outlets, means manufacturers have weigh up a series of factors when looking to make changes to their supply chains. just-food reports back from the IGD Supply Chain Summit on what executives in the field believe are the key issues to consider.