When it comes to combining units, there are various methods to consider, depending on the desired level and type of integration. Merger, acquisition, and alliance are some of the common approaches. Merger involves combining two or more units into one new unit with a new identity and structure. This is suitable for units with similar or complementary functions, goals, and cultures that want to create synergies and efficiencies. Acquisition involves one unit taking over another unit and absorbing its resources, functions, and identity. This is ideal for units with different or competing functions, goals, and cultures that want to gain market share or eliminate rivalry. Alliance involves two or more units forming a partnership or a joint venture while retaining their own names, structures, and identities. This is beneficial for units with distinct or diverse functions, goals, and cultures that want to leverage each other's strengths and capabilities. Each method has its own pros and cons; thus, careful planning and execution is necessary in order to choose the method that best fits your situation, objectives, and culture.