Forbes long has considered financial efficiency an important factor for would-be donors to consider.

FORBES: Largest-Charities Methodology: Size, Then Financial Efficiency

The Index measures solar players according to their financial performance and operational efficiency, with an emphasis on revenue growth, working capital, EBIT percentage and debt-to-equity, among other measures.

FORBES: Solar Leaders Pull Away From The Pack

For a description of the methodology, an explanation of the financial efficiency ratios and how donors can use the data, click here.

FORBES: The Largest U.S. Charities For 2012

To address these risks, companies should consider their operating models, in an effort designed to define an optimum balance between financial efficiency and assuredness of a stable supply chain.

FORBES: Supply Chain Risk a Hidden Liability for Many Companies