By applying the information in the case to Lepak and Snell's strategic workforce segmentation framework, the role of teaching assistant should be categorized as: 1 point "Professional", because the role is strategically central, but should be relatively easy to source in the labour market "Specialist", because the role is strategically not that central, but likely to be relatively difficult to source in the labour market "Critical", because this role is strategically central, and likely to be relatively difficult to source in the labour market "Doer", because the role is strategically not that central, and should be relatively easy to source in the labour market