The following appeared in a memorandum from the planning department of an electric power company."Several recent surveys indicate that home owners are increasingly eager to conserve energy. At the same time, manufacturers are now marketing many home appli

According memorandum, which is from planning department, power consumption will decline at some unspecified location, based on certain anonymous sources. But result drawn are based on number of false assumptions.

Firstly, Memorandum does not specify source of survey, so that validity of data provided by it are skeptical. Moreover, number of home owners involved in this survey is also missing, which further difficult to understand, which class of society actually involved in this survey. If upper middle class is involved, then it may be the case that they can replace their home appliances with newer one. But lower middle class people may not eager to buy recent home appliances.

Secondly, planning department has mentioned manufacturer are involved in marketing for newer devices. But as per common business model, each company has to do some marketing for their better sale. Because of recent marketing campaign, it is not necessary that increase in sale will be drastically high than previous records. Moreover planning department has mentioned that newer devices are more (at least double) energy efficient than previously sold devices. But they haven't mentioned any concrete proof for this, so validity of same again in question.

Thirdly, weak cause and effect phenomenon has drawn by planning department that due to marketing of newer appliances people will prefer to buy it. But it may be case the that customer will prefer to buy such devices not to replace older one. In this case energy consumption will increase instead of declining. Also manufacturer can introduce some brand new appliances like food processor or shoe polish machine etc etc., here also energy consumption will be drastically higher. Additionally, they have mentioned energy consumption for last twenty years is constant. But it may be the case because of developing nature of that locality, population or industry may increase in future. So planning department has to consider this factor too before come up with result.

So in the end, planning department has to reconsider some factor on which they have suggested that additional energy power plant is unnecessary. And they should conduct location and class based survey to come up with more strong results.