CitiesResources
Optimization Modeling
If you’ve ever studied a crowded supermarket shelf—Which brand? Size? Price?—you know the challenge of comparison shopping. So do conservationists. From state governments to local land trusts, cash-strapped conservationists must choose which of America’s special places to save. Today, with tight budgets, those choices are tougher than ever.But we’ve developed a tool that can help. Our strategic conservation team, working with a resource economist, has crafted a computer model that enables conservationists to shop smart—by evaluating potential conservation projects for best dollar value.
“We all want the most bang for our buck, and conservation is no different,” says Will Allen, our director of strategic conservation. “Are you spending too much money on expensive projects, or are you getting real value? With public budgets so tight, government officials must be able to justify how they’re spending these dollars wisely.”
The new model “optimizes” conservation decisions. It works by turning raw data about conservation decisions—project costs, benefits (scored numerically), budget constraints—into a user-friendly spreadsheet yielding comparison shopping conclusions. Using the model, for example, a government agency can quickly compare the relative value of all possible projects and then make, and justify, an informed choice.
Optimization Modeling On The Ground
On the ground, the Baltimore County Agricultural Land Preservation Program in Maryland has already used our optimization model to save 22% more farmland than it would have otherwise over the past three years. Every year since 2007, Baltimore County has applied the optimization model to choose which agricultural lands to save. Optimization has helped the county protect an additional 680 acres of high-quality agricultural land, at a cost savings of roughly $5.4 million—a return on investment over three years of more than 60 to 1. In other words, for every $1 that Baltimore County spent using the optimization model, it has gained more than $60 in conservation benefits.Wally Lippincott, Land Preservation Administrator in Baltimore County, is pleased with the results: “After trying for years to balance price with farm quality using rank based methods, we switched to optimization. In the first three years of using optimization, Baltimore County has been able to protect an additional 680 acres for the same amount of funds that would otherwise have been spent. This also translates into a savings of approximately $5.4 million.”
Rob Hirsch likes that the program is easy to use: “Optimization has proven easier to administer and run than our old methods. During our rank-based days, we performed extra administrative and mathematical work in order to solicit discounts and award extra LESA points for discounting. With optimization, this is no longer required.”
