The target respondents at this stage of survey were shippers who had earlier responded to the first stage. Through face-to-face interviews and mail surveys with follow-up phone calls made to clarify the questionnaire, 19 and 15 responses were received from suppliers of automotive parts and consumer goods respectively. It appeared that there were few shippers who had previously participated in the first stage survey but did not respond to the second stage survey. This was perhaps attributed to the fact that the questionnaire used in the second stage survey demanded respondents to deal with an exhaustive list of service attributes. To encourage participation from the shippers, future studies may have to consider limiting the number of service features to be incorporated in the questionnaire.