The strategic performance evaluation does not monitor the activities of external sources of marketing assistance.

That statement is false
Strategic performance evaluation monitors all activities that could influence company's productivity, including the external sources.
In fact, external sources could contribute greately in company's performance. For example, Government could suddenly lower tax-rate for trading with a neighboring country where company obtain most of its raw material.

The business cycle is the periodic but irregular up-and-down movement in economic activity, measured by fluctuations in real gross domestic product (gdp) and other macroeconomic variables. a business cycle is typically characterized by four phases—recession, recovery, growth, and decline—that repeat themselves over time. economists note, however, that complete business cycles vary in length. the duration of business cycles can be anywhere from about two to twelve years, with most cycles averaging six years in length. some business analysts use the business cycle model and terminology to study and explain fluctuations in business inventory and other individual elements of corporate operations. but the term "business cycle" is still primarily associated with larger (industry-wide, regional, national, or even international) business trends.

Ithink its b hope it ! : )