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| Cohort analysis ： ウィキペディア英語版 |
Cohort analysis
Cohort analysis is a subset of behavioral analytics that takes the data from a given eCommerce platform, web application, or online game and rather than looking at all users as one unit, it breaks them into related groups for analysis. These related groups, or cohorts, usually share common characteristics or experiences within a defined time-span. Cohort analysis allows a company to “see patterns clearly across the life-cycle of a customer (or user), rather than slicing across all customers blindly without accounting for the natural cycle that a customer undergoes.” By seeing these patterns of time, a company can adapt and tailor its service to those specific cohorts. While cohort analysis is sometimes associated with a cohort study, they are different and should not be viewed as one and the same. Cohort analysis has come to describe specifically the analysis of cohorts in regards to big data and business analytics, while a cohort study is a more general umbrella term that describes a type of study in which data is broken down into similar groups.
==Examples==
The goal of any business analytic tool is to analyze and present actionable information to a company to act on, and focus on the "average user" of a given system. In order for a company to act on such info it must be relevant to the situation at hand. A database full of thousands or even millions of entries of all user data makes it tough to gain actionable data, as those data span many different categories and time periods. Actionable cohort analysis allows for the ability to drill down to the users of each specific cohort to gain a better understanding of their behaviors, such as if users checked out, and how much did they pay. In cohort analysis "each new group () provides the opportunity to start with a fresh set of users,"〔(【引用サイトリンク】first=Jonathon )〕 allowing the company to look at only the data that is relevant to the current query and act on it.
In eCommerce, a firm may only be interested in customers who signed up in the last two weeks and who made a purchase, which is an example of a specific cohort. A software developer may only care about the data from users who sign up after a certain upgrade, or who use certain features of the platform.
An example of cohort analysis of gamers on a certain platform: Expert gamers, cohort 1, will care more about advanced features and lag time compared to new sign-ups, cohort 2. With these two cohorts determined, and the analysis run, the gaming company would be presented with a visual representation of the data specific to the two cohorts. It could then see that a slight lag in load times has been translating into a significant loss of revenue from advanced gamers, while new sign-ups have not even noticed the lag. Had the company simply looked at its overall revenue reports for all customers, it would not have been able to see the differences between these two cohorts. Cohort analysis allows a company to pick up on patterns and trends and make the changes necessary to keep both advanced and new gamers happy.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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