Social psychologists have developed several theories for explaining the ways in which the psychology of a crowd differs from and interacts with that of the individuals within it. Major theorists in crowd psychology include Gustave Le Bon, Gabriel Tarde, Sigmund Freud, and Steve Reicher.
KPIs, or key performance indicators, are measures too. But generally, KPIs are the most important measures for a business or organisation, usually having the highest leverage to impact its success. Due to their catchy name, the term KPI has almost become synonymous with the term performance measure.
OPI. Operational performance indicators are similar to KPIs in that both refer to the vital metrics of an aspect of your business. But while a KPI looks at broad categories, an OPI measures a specific function or operation -- typically one at a bottleneck for your business.etting up systems for your business doesn't mean choosing among SLA, KPI and OPI for your metrics. A strong business plan will apply all three metrics at appropriate points. OPIs will measure the performance of key points of your operation, while KPIs will rate how well your business interacts with the market.