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A low-speed wind tunnel study and flight tests were performed to examine the effects of a wing fence on the T-38A. Wind tunnel results were based upon force and moment data collected with a six-component balance and flow visualization at Reynolds numbers up to 0.3 x 106, based on mean aerodynamic chord. The model did not include the last 7.79 feet of the aircraft, and the engine and exhaust were modeled as through-holes. Five fence geometries, placed at wing station 125 (± 0.825 semispan), were compared. The best performer of these designs, based on drag polar, was the fence that wrapped the leading edge and extended 84.6 percent of the local chord length along the wing's upper surface. Wind tunnel data showed that this fence increased the lift coefficient by up to 6.3 ± 0.6 percent and reduced spanwise and separated flow outboard the fence. The flight-tested fence was based on the best performing fence design from the wind tunnel study. The results were based on aircraft instrumentation and flow visualization at Reynolds numbers up to 9.98 x 106. It was inconclusive whether the fence caused an increase in lift coefficient. The fence reduced the roll-off tendency and wing rock during approaches to stall. Tuft visualization on the aircraft wing suggested that the fence reduced spanwise and separated flow outboard the fence, which agreed with the wind tunnel results.

PurposeDespite the availability of methods and techniques designed to assist with predictive and retrospective evaluation of ICT initiatives, management continues to struggle to perform meaningful evaluations, and the measurement of ICT investment payoff remains a challenge. A recurring problem associated with failed ICT‐based investment is poor change management. This paper aims to focus on the value of understanding the change management aspects of ICT investments.Design/methodology/approachA framework was developed from a study of the change management literature. An empirical investigation involving a qualitative case study approach was then conducted in order to assess the efficacy of the framework during the evaluation process.FindingsBusiness benefit from ICT is likely only when ICT investment is accompanied by appropriate change management skills. The study highlights the particular importance of communication, championing and change agency, resources, and the project timescale.Research limitations/implicationsResults were generated from a single case study. It is also acknowledged that it is unclear what impact (if any) a parallel project had on the project under investigation.Practical implicationsThe paper highlights the value of effective change management, placing particular emphasis on effective communication during all stages of a project.Originality/valueThe paper explicitly employs change management techniques in order to identify potential problem areas. It recommends longitudinal research be conducted in order to employ the framework during both ex ante and ex post evaluation for a single initiative.

PurposeThe literature on enterprise resource planning (ERP) implementation has been dominated by variance theories which have identified numerous lists of critical success factors (CSFs) for managing implementation but there has been relatively little research adopting a process theory approach which explains how change occurs. One such theory, the teleological process, has been criticised in the IS literature for its capability to evolve and learn due to its convergence towards an end goal. Drawing upon the field of organisational development (OD), the purpose of this paper is to illustrate the usefulness of the theory and contend that, whilst it exhibits planned behaviour, events are adaptive and learned and emerge though social construction of actors in organisations.Design/methodology/approachAn in‐depth interpretive study of eight public‐sector organisations is used. During the investigation, two primary methods of data collection were analysed: survey questionnaires (2) and in‐depth interviews (38).FindingsThe data were analysed and contrasted with themes and attributes associated with teleological design. The article highlights how the central role of an agent or entity, and its interaction with eight key attributes, is critical to the success of the change process.Originality/valueThe article proposes benefits of applying teleological theory to the context of designing the change, pre and post project implementation. Whilst the data are based in the UK, the framework also provides a useful starting point for further research in ERP implementation in developing and emerging nations of areas likely to be problematic.

In this paper, we consider the synergy between two areas of information system (IS) literature: that concerned with the evaluation of IS and that concerned with explaining the phenomenon of IS failure. On the basis of an analysis of both areas, a model is presented which attempts to integrate IS evaluation into the life cycle of IS development. The model links the issue of failure assessment with the evaluation process and constitutes a strategy for stimulating organisational learning in relation to IS development. The paper concludes with a description of our attempts to validate aspects of the model and plans for further empirical work in this area.

Purpose– The purpose of this paper is to perform a systematic review of articles that have used the unified theory of acceptance and use of technology (UTAUT).Design/methodology/approach– The results produced in this research are based on the literature analysis of 174 existing articles on the UTAUT model. This has been performed by collecting data including demographic details, methodological details, limitations, and significance of relationships between the constructs from the available articles based on the UTAUT.Findings– The findings indicated that general purpose systems and specialized business systems were examined in the majority of the articles using the UTAUT. The analysis also indicated that cross-sectional approach, survey methods, and structural equation modelling analysis techniques were the most explored research methodologies whereas SPSS was found to be the largely used analysis tools. Moreover, the weight analysis of independent variables indicates that variables such as performance expectancy and behavioural intention qualified for the best predictor category. Moreover, the analysis also suggested that single subject or biased sample as the most explored limitation across all studies.Research limitations/implications– The search activities were centered on occurrences of keywords to avoid tracing a large number of publications where these keywords might have been used as casual words in the main text. However, we acknowledge that there may be a number of studies, which lack keywords in the title, but still focus upon UTAUT in some form.Originality/value– This is the first research of its type which has extensively examined the literature on the UTAUT and provided the researchers with the accumulative knowledge about the model.

PurposeThe purpose of this paper is to systematically review and analyse the critical challenges and barriers of e‐government adoption. Such review aims to suggest the salient facts about the issues of successful implementation or adoption of the e‐government services under different circumstances to the researchers.Design/methodology/approachA total of 78 relevant research papers reviewing and analysing the challenges, barriers, and critical success factors were selected from a set of overall 448 articles on e‐government adoption research. These studies were comprehensively reviewed to examine some of the most significant supply and demand‐side challenges, barriers, and critical success factors explored by different studies in this context.FindingsThe findings indicated that technological barriers, lack of security and privacy, lack of trust, lack of resources, digital divide, poor management and infrastructure, lack of awareness, legal barriers, lack of IT infrastructure, and resilience were among some of the most commonly experienced challenges and barriers across the relevant studies. Moreover, it was also found that challenges and barriers associated with supply‐side (i.e. implementation) (C=53) were almost three times to the one applied to the demand‐side (i.e. adoption) (C=18). Furthermore, it was also found that citizen's satisfaction, information accuracy, security, and privacy were some of the critical factors for the success of e‐government initiatives.Research limitations/implicationsThis research only reviews the challenges, barriers and critical success factors and leaving apart many other research themes such as impact, digital divide, security, privacy, trust, and risk of e‐government adoption. Moreover, the theoretical and methodological paradigm of this research have not been explored.Originality/valueThis paper presents a comprehensive review of the challenges, barriers, and critical success factors of the e‐government adoption research both with regard to supply as well as demand side. Such review allows us to provide not only a brief account of the issues experienced in the e‐government research, but also prescribes the guidelines for the governments to consider certain facts before successfully implement their e‐government initiatives. Such a comprehensive review of e‐government adoption literature has not been performed earlier.

PurposeThe purpose of this paper is to empirically examine the performance of the alternative IS/IT adoption models used more frequently in the citizen centric adoption of e‐government systems. Such analysis will not only provide a trend about the models and subsequent constructs being utilized in this area of research but also guides us toward laying a foundation for the formulation of an alternative integrated model for citizen centric adoption of e‐government services.Design/methodology/approachThe relevant secondary data from 87 research studies on citizen centric e‐government services were analysed to examine the performance of some of the most frequently used alternative models (e.g. technology acceptance model (TAM), diffusion of innovation|innovation diffusion theory (DOI|IDT), DeLone and McLean IS success model, unified theory of acceptance and use of technology (UTAUT), and theory of planned behaviour (TPB)) of IS/IT adoption in this area of research.FindingsThe findings of this research indicate that TAM is by far the best suited model for analysing citizen centric adoption of e‐government services. It was also found that although diffusion of innovation|innovation diffusion theory (DOI|IDT) is the second highly used model, only three of its constructs (i.e. compatibility, complexity, and relative advantage) were in use across various studies. Moreover, it was visualised that constructs such as triability and observability were never used in the e‐government context. Similarly, the constructs from TPB have not been used up to the presence of the model across various studies. All the constructs (i.e. performance expectancy, effort expectancy, and social influence) of the UTAUT model, except facilitating conditions, have been used quite regularly.Research limitations/implicationsThis research evaluates the various IS/IT adoption research models being used in e‐government adoption only on the basis of their performances across the existing research studies. The evaluation of the performance of such models may not reflect their true picture only through meta‐analysis.Originality/valueThis paper presents a comprehensive meta‐analysis of some of the most frequently used IS/IT adoption models in the context of e‐government adoption research. Such analysis would help us picking up the most appropriate models and/or their constructs for developing an alternative model for our research.