he following competencies belong to this domain:

25. Create a case definition and adjust it as necessary during the investigation
26. Describe the outbreak in terms of person, place and time
27. Generate hypothesis about the cause and/or risk factors of the outbreak
28. Conduct analytical epidemiological investigation to identify the source
29. Recommend appropriate evidence based measures to control the outbreak
30. Report and present results of an investigation 

See also the FEMWiki chapters:

Outbreak Investigation