2 Methodology
To examine the linkage between integration and logistical performance we designed a questionnaire with three sections, each one of them related to one construct: internal integration (Logistics-Marketing and Logistics-Production), external integration and performance.
In the internal integration part of the questionnaire we asked companies to measure the level of integration in two internal interfaces: Logistics-Marketing and Logistics-Production. The variables used to measure these integration levels are shown in table 1. They were defined from the literature (Stank, Daugherty & Ellinger, 2000 and Ellinger, Daugherty & Keller, 2000) and based on expert opinion to provide respondents with a common understanding of the questions.