A fundamental problem in managing product development is the optimal timing, frequency, and fidelity of sequential testing activities that are carried out to evaluate novel product concepts and designs. In this paper, we develop a mathematical model that treats testing as an activity that...

An important managerial problem in product design in the extent to which testing activities are carried out in parallel or in series. Parallel testing has the advantage of proceeding more rapidly than serial testing but does not take advantage of the potential for learning between tests, thus...

Accurate marketing research depends on accurate user judgments regarding their needs. However, for very novel products or in product categories characterized by rapid change---such as "high technology" products---most potential users will not have the real-world experience needed to problem...

Traditional idea generation techniques based on customer input usually collect information on new product needs from a random or typical set of customers. The "lead user process" takes a different approach. It collects information about both needs and solutions from users at the leading edges of...

It is known that end users of products and services sometimes innovate, and that innovations developed by users sometimes become the basis for important newcommercial products and services. It has also been argued and to some extent shown that such innovations will be found concentrated in a...

Those who solve more of a given type of problem tend to get better at it---which suggests that problems of any given type should be brought to specialists for a solution. However, in this paper we argue that agency-related costs and information transfer costs ("sticky" local information) will...

Recently, a "lead user" concept has been proposed for new product development in fields subject to rapid change (von Hippel [von Hippel, E. 1986. Lead users: A source of novel product concepts. Management Sci. 32 791--805.]). In this paper we integrate market research within this lead user...

Breaking with many established assumptions about how innovation ought to work, open source software projects offer eye-opening examples of novel innovation practices for students and practitioners in many fields. In this article we briefly review existing research on the open source phenomenon...

To solve a problem, needed information and problem-solving capabilities must be brought together. Often the information used in technical problem solving is costly to acquire, transfer, and use in a new location---is, in our terms, "sticky." In this paper we explore the impact of information...

In the traditional new product development process, manufacturers first explore user needs and then develop responsive products. Developing an accurate understanding of a user need is not simple or fast or cheap, however. As a result, the traditional approach is coming under increasing strain as...