Table 2

Hierarchical task analysis including task variations

Phase	Theme	Sub-themes	No. of sub tasks/task variations
Peri-operative	Tracer injection	Choice of tracing agent Site of injection Tracer concentration Total volume of injected Injection technique	34
	Uterine manipulation	Use of manipulator at all Timing of manipulator insertion Type of uterine manipulator	9
	Sequence of initial steps	Timing of entry Timing of adhesiolysis Timing of staging inspection	7
Operative	Preparation/opening spaces	Transperitoneal identification of channels' pelvic side wall spaces	10
	Identifying anatomy, lymphatic channels, and sentinel nodes	Anatomical structure Methods of locating nodes	24
	Excision and confirmation of mapped nodes	Defining the SLN Technique of nodal excision Mode of ex vivo SLN confirmation	7
	Specimen retrieval	Mode of containment	5
Troubleshooting	Action plan for no nodes mapped		5
Post-operative	Specimen labeling	Anatomical site Laterality	4
Post-operative	Pathology processing		2