This paper compares EPA’s ex ante cost analysis of the 2001 maximum contaminant limit (MCL) for Arsenic in Drinking Water to an ex post assessment of the costs. Because comprehensive cost information for installed treatment technologies or other mitigation strategies pursued by water systems to meet the new standard is not available, this case study relies upon ex post cost data from EPA Demons...

This paper describes how multitasking and merge bias may impact the procurement time of complex equipment, such as power distribution equipment used in capital projects. The time required to procure this type of product is often based on past experience and ad hoc assumptions, without explicit consideration for the contributing factors. Capital projects are becoming increasingly complex, requir...

We analyze a continuous-time model of dynamic project choices by an agent that is relevant to various important issues in financial economics. An agent controls the drift and volatility of a lognormal output process by dynamically selecting one of N projects. Under broad conditions, the optimal risk-taking policy is characterized by at most K − 1 unique switching triggers, where K is the number...

This paper extends the concept of value-based software engineering as proposed by Boehm to the field of software maintenance. The various approaches to assessing the value of software products and to calculating the return of investment (ROI) on software projects are reviewed. The authors propose a methodology of value-driven software maintenance for assessing the value of software maintenance ...

When writing can change your life, when writing can enrich you by offering much money, why don't you try it? Are you still very confused of where getting the ideas? Do you still have no idea with what you are going to write? Now, you will need reading. A good writer is a good reader at once. You can define how you write depending on what books to read. This have we made progress the clinical pl...