It is commonly agreed that the employees are the biggest resource for organizations. However, quantifying their performances becomes very difficult. Traditionally qualitative measures were used up and even when quantitative ones were applied, they have been individual performances which do not reflect on final group goals. Thus the field of talent management and HR overall have a lot to learn from marketing. With the advent of the internet precise business intelligence could be eked out. Thus marketers learnt to graduate from simply tracking ad impressions to actually measuring their impact on sales using the data available. HR personnel similarly need to shift from a cost to value mindset. Also, marketers seek to understand their market beyond local geographies, so similarly HR leaders must also embrace a diverse workforce. The movement of HR as a field to more quantitative a discipline goes on.

Source:http://www.forbes.com/sites/gaudianohunt/2016/10/24/how-do-you-quantify-the-value-of-your-companys-talent/#3cc509fb3a72