Pagell and Wu (2009) based their research on a case study of 10 firms. The research looked at the entire supply chain by analyzing the environmental and social outcomes of the managerial activities.
Pagell and Wu (2009) obtained their results from questions asked about the management principles that the firms used in order to attain a sustainable supply chain. The research found that sustainability can be realized if organizations can make use of best practices of supply chain management. This method of data collection is effective for enables the researcher to obtain objective information from the interviewee. Pagell and Wu (2009) data range was also effective in producing results that were unbiased because they made use of a reasonable sample population.