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A make or buy analysis can be used to decide whether project activities should be undertaken by the in-house project team or whether these activities should be contracted to an external vendor. Several factors should to be considered in the make or buy decision such as the availability of the required expertise in-house, organization’s current skills and abilities, cost effectiveness by engaging the external vendors, recruiting more experts, etc.
Decision Analysis and Resolution (DAR) is a technique to analyse possible decisions using a formal evaluation process that evaluates identified alternatives against established criteria. We will use the Decision Analysis and Resolution (DAR) to evaluate different options.
For more details, you can refer to the medium link I had provided earlier.
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