Operational due diligence is important for private equity firms to identify areas for improvement in target companies, such as purchasing, supply chain, and sales. This allows firms to make informed buying decisions. Key areas of focus include sales and marketing capabilities, procurement spending analysis, manufacturing and supply chain network optimization, leveraging technology in administration, and assessing service provider risks. HCL recommends a systematic approach over 6-8 weeks involving subject matter experts and industry benchmarks to comprehensively evaluate a target company's performance, value creation potential, and risks.