3. Research methodology
A questionnaire was developed to investigate safety personnel's
perceptions of training strategies in the top 400 contractors in the
U.S. The recipients of the questionnaire survey were obtained from
the top 400 contractors list of Engineering News-Record (The Top
400 Contractors, 2011). The e-mail list was developed by using
information collected from websites such as http://www.jigsaw.
com/ and http://cmaanet.org/search-a-cmpm. The questionnaire
was administered through a service called SurveyMonkey (http://
www.surveymonkey.com). Out of the 400 companies approached,
58 responses were received by the cut-off date of October 11th,
2011, amounting to a rate of response of 15%. The actual rate of