Quantum was a large manufacturer of storage devices that was implementing an ERP system called WARP to integrate its nine legacy systems following an acquisition. It was considering a big-bang or phased implementation approach. A phased approach would implement modules gradually by location, while a big-bang would change all systems at once. Factors like organizational size and complexity, hierarchy, and implementation scope would determine the best choice. A phased approach allowed maintaining commitments more easily but was slower, while big-bang was faster but riskier if issues arose.