Eric and Mark are both geotechnical engineers on a highway construction project. They disagree on the pavement design of highway section and frequently get into shouting matches. Eric thinks that Mark's design is not adequate for the traffic load of the highway and thus Mark's estimate is an under-designed estimate. Mark thinks that Eric's design is an over kill and thus Eric's estimate is an overly-designed estimate. They are not talking to each other during team meetings and other office gatherings. What stage of team development, this scenario demonstrates