“…For example, large bundles can lead to increased leverage (e.g., Kaufmann and Carter, 2002) due to synergies, but care must be taken to maintain a homogeneous RFQ when adding additional items to the bundle. As such, considered items should be grouped into attractive bid lots (Mabert and Skeels, 2002), where items included should be characterized by similarities in manufacturing processes or delivery regions (Jap, 2002), or application or technical requirements (Schoenherr and Mabert, 2006). When the individual items are very different, or a wide variety of capabilities is needed to produce them, the bundle is less attractive to suppliers (Mabert and Skeels, 2002), leading to overall poorer bundle performance.…”