Pugwash,
The are many layers to the JW mindset, and I'm sure other posters will mention these layers, but I will mention just this one. First of all the organization is a record-keeping organization. The sign of spiritual maturity to JWs is one who is an active publisher (one who goes door-to-door with literature and the Bible, conducts Bible studies, and makes return visits on people who show interest), turns in hours spent in these activities, how much literature was left with individuals is written down, etc. Therefore he/she is making a record which is permanently put on their Publisher's Record Card which is kept in a file in the congregation he/she is associated with. This "spiritual mature person" also comments at meetings, and just is an all around active person in the organization. If one stops or slows down doing these things, the first thing that is noticed is that the hours are lower. If they stop commenting at meetings, that is noticed. If no time or hours are turned in for one month, that person is considered an irregular publisher and is considered as needing assistance, especially if this trend goes on for several months. Attention is given to that person, such as shepherding calls by the elders, a Bible study is encouraged, by the elders and either a very active publisher or a pioneer is assigned to study with that person to get him "activated" again. These are some of the checks and balances I mentioned.