As open source development has evolved, differentiation of roles and increased sophistication of collaborative processes has occurred. Recently, we described coordination issues in software development and an interactive visualization tool called the Social Health Overview (SHO) developed to address them [12]. This paper presents an empirical evaluation of SHO intended to identify its strengths and weaknesses. Eleven informants in various open source roles were interviewed about their work practices. Eight of these participated in an evaluation comparing three change management tasks in SHO and Bugzilla. Results are discussed with respect to task strategy with each tool and participants' roles.

Abstract. Storyboarding offers designers the opportunity to illustrate a visual narrative of use. Because designers often refer to past ideas, we argue storyboards can be constructed by reusing shared artifacts. We present a study in which we explore how designers reuse artifacts consisting of images and rationale during storyboard construction. We find images can aid in accessing rationale and that connections among features aid in deciding what to reuse, creating new artifacts, and constructing. Based on requirements derived from our findings, we present a storyboarding tool, PIC-UP, to facilitate artifact sharing and reuse and evaluate its use in an exploratory study. We conclude with remarks on facilitating reuse and future work.

Reusing HCI design knowledge shows potential in allowing practitioners to design based on previously identified concerns. A reuse approach is presented that is based on claims, design knowledge units encapsulating tradeoffs. Fundamental characteristics of reuse include abstraction, selection, specification, and integration. Claim relationships provide the key to instantiating each of these traits within the claims reuse approach. A claims library is used implement a working model of the reuse process. Studies analyzing various components of this work validate existing efforts and provide impetus for future work.

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