The interdisciplinary study of profitability and popularity of the strategic layout of menu items is referred to as menu engineering. It also deals with menu pricing, design, and content. A grid is also used to evaluate decisions regarding current and future menu content. It is also a management application.
Diversifying a portfolio refers to investing in securities that either have a lower risk or risk that is not correlated such that the risk to the portfolio is reduced.
In this scenario, Juan is investing in different securities with varying risk levels so that the portfolio will not be completely wiped out if one security goes bust. To truly diversify his portfolio however, Juan should invest in more than other asset classes such as bonds