Nevertheless, while the oldest studies only focused on efficiency, the most recent ones also take into account the factors that affect efficiency.
A third approach would be to focus on efficiency.
The first part of a new strategy focuses on efficiency and effectiveness.
Then, it tackled patient care, trimming unnecessary procedures and focusing on efficiency and preventative care.
In recent years, content companies have become more sedate and disciplined, focussing on efficiency rather than on acquisitions.
The company was in trouble during the 1990s and subsequently introduced "lean manufacturing", which focuses on efficiency and micro-management.
"The Mayor focusses on efficiency, getting the most out of your resources," Ray Kelly, the police commissioner, told me.
Rio and the organising committee say they are focusing on efficiency, legacy and entertainment rather than scale, grandeur and cost.
Another reason for focusing on efficiency over power is perhaps the coming end of Moore's Law.
A busy executive, for example, focuses on efficiency; his assistant tells me, "My boss outsources patience to me".
