Economic Evaluation Engine

A REST API for multi-year financial analysis
created by NIST

Features

Performance

E³ utilizes precise optimization techniques to deliver answers as fast as possible, even at scale.
Cash Flow Calculations

Presents future dollar values in their present value for easily understandable results.
Sensitivity Analysis

Alter individual inputs by percentage or gross amounts to find which variables effect your cash flows the most.
Uncertainty Analysis

Run thousands of simulations with multiple, randomly distributed inputs to model uncertainty in your monetary calculations.
Tag Groups

Group arbitrary cash flows together to better understand your specific expenses.

Powered by E3

[PV]²

[PV]² is a web application that allows homeowners to determine a complete cost of ownership for residential rooftop solar photovoltaic (PV) systems including purchase and operation through the system’s service life.
SITExpress

SITExpress is a simplified online version of NIST's Smart Investment Tool that calculates metrics for investment analysis documented in NIST Advanced manufacturing Series 200-5. It calculates net present value, internal rate of return, and payback period. The tool helps to identify the most economical projects/investments. For instance, it could be used to identify the most economical heating and cooling system or it might be used to rank a set of potential investments.
BLCC

Building Life Cycle Cost (BLCC) conducts economic analyses by evaluating the relative cost-effectiveness of alternative buildings and building-related systems or components. Typically, BLCC is used to evaluate alternative designs that have higher initial costs but lower operating costs over the project life than the lowest-initial-cost design. It is especially useful for evaluating the costs and benefits of energy and water conservation and renewable energy projects.

The life cycle cost (LCC) of two or more alternative designs are computed and compared to determine which has the lowest LCC and is therefore more economical in the long run. BLCC also calculates comparative economic measures for alternative designs, including net savings, savings-to-investment ratio, adjusted internal rate of return, and years to payback.

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Source Code

This software was developed at the National Institute of Standards and Technology by employees of the Federal Government in the course of their official duties. Pursuant to title 17 Section 105 of the United States Code this software is not subject to copyright protection and is in the public domain. It is an experimental system. NIST assumes no responsibility whatsoever for its use by other parties, and makes no guarantees, expressed or implied, about its quality, reliability, or any other characteristic. We would appreciate acknowledgement if the software is used. This software can be redistributed and/or modified freely provided that any derivative works bear some notice that they are derived from it, and any modified versions bear some notice that they have been modified.