Since data mining is closely affiliated with other approaches, new practitioners of data mining often surprise their colleagues when they suggest that the data mining project will take many weeks. If one is confusing it with running ad hoc reports on an already identified problem area, the timeline discussed in this section may seem surprising. On one's very first data mining project, the new data miner may not feel fully prepared themselves. This section will explore each of the CRISP-DM phases and examine some considerations for estimating how long each phase will take. In general, something in the order of 8 to 20 weeks is probably a good rule of thumb.