I shall indicate supermarket consumption environment example. In general, supermarket visitors will expect to spend less time to visit any supermarkets to make choice to any foods. They will stay short time when they expect to buy less foods, even, they will stay more short time when they expect to buy more less foods in any supermarkets. So, any supermarkets will need to calculate their clients' limited time pressure how to influence their foods consumption number. If the supermarket visitor expects to spend maximum 20 minutes to buy any foods in the supermarket. Then, he may choose some different kinds of foods to buy, e.g. ice cream, fruit, bread, jam, fish etc. different kinds of foods, Otherwise, if the another supermarket visitor expects to spend maximum 10 minutes to buy any foods in the supermarket. Then, he may choose less different kinds of foods to compare the first one, e.g. fish, jam, ice cream only or bread, fruit, jam only. So, the second one supermarket visitor will buy less different kinds of foods, because he expects to spend 10 minutes maximum, his shopping spending time is less 10 minutes to compare the first one supermarket visitor. Because different supermarket visitor personal time pressure will limit him/her to choose more or less different kinds of foods to buy. However, time pressure will not influence every kind of foods number because every kind of food purchase number will not be influenced to buy more or less, due to the supermarket visitor personal time pressure variable factor influences his/her foods purchase number. Otherwise, the different kinds of food choice will be influenced to choose to either buy or not buy, due to every supermarket visitor personal time pressure is different.Hence, supermarkets can focus on how to avoid any kinds of food purchase choice loses, due to supermarket consumer personal time pressure influences. In fact, in supermarket every shelf, it usually has many different brands of every kind of foods to let supermarket visitors to choose to buy. For example, the kind of jam food number has many brands are placed on shelf to let them to choose, e.g. there are more than 10 different brands of jam food are placed on one shelf. It will bring one choice problem. IF one supermarket visitor expects to choose one brand of jam within 5 minute, then he finds the shelf has more than 10 different brands of jam are placed on the shelf. Then he will feel time pressure to cause difficulty to choose the best brand of jam to buy from these 10 brands of jam. It will bring the negative emotion if he feels that all of these 10 brands of jam taste and price has no more difference. Consequently, these 10 brands of jam choice will cause he can not make the final jam purchase decision within this 5 minutes individual time limited. Anyway, if there are only 5 brands of jam are placed on this shelf, then the 5 minutes time limited consumer will has less brands of jam choices, it will influence him to do more easy choice to buy one kind of brand jam food from the shelf. It is one limited time pressure of psychological choice factor to influence any consumers feel to do any brand of food choice more easy in short time. Hence, I recommend supermarket shelf ought place every kind of food brand maximum to 5 brands, it is the best food brand number to every supermarket's shelves to let any consumers to choose different kinds of foods to make the easy food choice way in supermarket food market.