Requirements for model server enabled collaborating on building information models

The application of Building Information Modelling (BIM) has demonstrated enormous potential to deliver consistency in the construction collaboration process. BIM can define an explicit configuration for digitized information exchange, however the technology to collaborate on models has not yet delivered the industry requirements for BIM collaboration. This research project is intended to provide a fresh review of industry requirements for BIM collaboration and will analyse how these requirements can be supported using a model server as a collaboration platform. This paper presents a review of existing collaboration platforms, with a particular focus to evaluate the research and development efforts on model servers as a collaboration platform. This paper also reports on the findings of three focus group sessions with industry practitioners to identify any problems in the available collaboration systems. The focus group findings identify a number of issues in current collaboration environments which help to understand the main domains of user requirements for BIM collaboration. These requirement domains will be further analysed to identify functional and technical specifications for a model server enabled collaboration platform

A study of BIM collaboration requirements and available features in existing model collaboration systems

Established collaboration practices in the construction industry are document centric and are challenged by the introduction of Building Information Modelling (BIM). Document management collaboration systems (e.g. Extranets) have significantly improved the document collaboration in recent years; however their capabilities for model collaboration are limited and do not support the complex requirements of BIM collaboration. The construction industry is responding to this situation by adopting emerging model collaboration systems (MCS), such as model servers, with the ability to exploit and reuse information directly from the models to extend the current intra-disciplinary collaboration towards integrated multi-disciplinary collaboration on models. The functions of existing MCSs have evolved from the manufacturing industry and there is no concrete study on how these functions correspond to the requirements of the construction industry, especially with BIM requirements. This research has conducted focus group sessions with major industry disciplines to explore the user requirements for BIM collaboration. The research results have been used to categorise and express the features of existing MCS which are then analysed in selected MCS from a user’s perspective. The potential of MCS and the match or gap in user requirements and available model collaboration features is discussed. This study concludes that model collaborative solutions for construction industry users are available in different capacities; however a comprehensive custom built solution is yet to be realized. The research results are useful for construction industry professionals, software developers and researchers involved in exploring collaborative solutions for the construction industry

Crown Ownership of Water in situ in Common Law Canada : Public Trusts, Classical Trusts and Fiduciary Duties

A clear understanding of the private law rules relating to water in situ is a necessary pre-condition to the success of any public law management regime. This article thus examines the private law rules applicable in the common law provinces to determine if there are functional equivalents to Québec’s private law principle of res communis and its statutory notion of State “custodianship”.It concludes that while there is no direct functional equivalent to the concept of res communis, there is an acceptance — almost by default — of Crown ownership of water in situ, an acceptance reflected in the legislation of the western provinces. However, this Crown ownership is not full and absolute but rather limited, more in the nature of “custodianship” than “ownership”. This conclusion follows an exploration of three equitable institutions — the public trust, the classical trust and fiduciary duties. In each case, the argument for limitation is difficult, but not impossible, to make.Une compréhension appropriée des règles de droit privé portant sur l’eau in situ est un préalable nécessaire au succès de tout régime public de gestion de l’eau. L’article qui suit examine les règles de droit privé applicables dans les provinces de common law pour déterminer dans quelle mesure il y existe des équivalents fonctionnels à la res communis, principe de droit privé auquel l’eau est assujettie, ainsi qu’à la notion statutaire de l’État comme « gardien des intérêts de la nation » en droit québécois.L’auteure conclut qu’il n’y a pas d’équivalent fonctionnel direct au concept de res communis mais plutôt une acceptation — presque par défaut — du fait que la Couronne est propriétaire de l’eau in situ, acceptation qui se retrouve d’ailleurs dans la législation des provinces de l’Ouest. Cependant, la propriété de la Couronne n’est pas pleine et absolue mais plutôt limitée, avec des pouvoirs s’assimilant davantage à ceux du gardien qu’à ceux du propriétaire. Cette conclusion découle de l’exploration de trois institutions reconnues en équité, soit la fiducie publique, la fiducie classique et les devoirs fiduciaires. Pour chaque institution, l’argument en faveur de l’existence d’une limitation est difficile, mais non impossible, à soutenir

La finalité des décisions de la Commission de protection du territoire agricole du Québec : quelques réflexions sur l'affaire Bell Hélicoptères

In the Bell Helicopter case, the government intervened under the Act to preserve agricultural land to grant Bell the necessary permission to install a helicopter assembly plant in an agricultural zone near Mirabel Airport notwithstanding a decision to contrary effect by the Commission de protection du territoire agricole du Québec (C.P.T.A.Q.). It did so even though the statute states that such decisions are « final and without appeal ». This article examines the role of the provincial government in protecting agricultural land and suggests several statutory changes that could ensure an effective role to the government while still respecting the independence of the C.P.T.A.Q

La décentralisation de l'aménagement du territoire : mythe ou réalité?

This paper examines the tension between centralizing and decentralizing forces in systems of land use planning. Its thesis, drawn from the LaHaye Report, is that the degree of centralization of the system is directly proportional to the breadth of jurisdiction of the planning authority. While Quebec's system of land use planning is reputed to be decentralized and political, the author questions whether this assessment is correct. The role of the government under the Land Use Planning and Development Act and other specialized legislation is more in accordance with the centralized and technocratic systems advocated in earlier Quebec proposals for land use planning. This conclusion is reinforced by a consideration of the suggestions put forward in Le Choix des régions and their present-day application

'Fresh start': a model for success and sustainable change?

This thesis examines the rationale and debate of the ‘Fresh Start’ schools policy introduced by the New Labour government in 1997 as a vehicle for improvement in schools that historically had been classified as failing. Underpinning the policy is the assumption that Fresh Start can act as a catalytic agent of positive change to performance, school cultures and the school community. The literature review examines school improvement in schools with challenging circumstances (where many Fresh Start schools are based) and includes the theoretical framework underpinning school improvement. It examines the recent political context that has driven school improvement, the role of inspection in identifying failing schools, the development of Fresh Start policy and alternative routes available to schools failing their OFSTED inspection. The case study traces the transformation process and outlines the profile of the first Fresh Start Primary School in England with a population of 40% Travellers on the school roll. It includes an early evaluation of a number of initiatives associated with catalytic change and school improvement that have been employed in the case study school, in other Fresh Start Primary Schools in England and in socio-economically disadvantaged schools around the world. It looks particularly at the impact of breakfast clubs, a school-wide literacy scheme, ‘Success for All’, and community education based in the school. The impact of these initiatives is considered within the context of the school, the school community and government policy. The research findings conclude that Fresh Start together with the initiatives have been effective strategies for improvement in the case study school, and may provide a good model for other schools in similar circumstances

The Quit Benefits Model: a Markov model for assessing the health benefits and health care cost savings of quitting smoking

BACKGROUND: In response to the lack of comprehensive information about the health and economic benefits of quitting smoking for Australians, we developed the Quit Benefits Model (QBM). METHODS: The QBM is a Markov model, programmed in TreeAge, that assesses the consequences of quitting in terms of cases avoided of the four most common smoking-associated diseases, deaths avoided, and quality-adjusted life-years (QALYs) and health care costs saved (in Australian dollars, A$). Quitting outcomes can be assessed for males and females in 14 five year age-groups from 15–19 to 80–84 years. Exponential models, based on data from large case-control and cohort studies, were developed to estimate the decline over time after quitting in the risk of acute myocardial infarction (AMI), stroke, lung cancer, chronic obstructive pulmonary disease (COPD), and death. Australian data for the year 2001 were sourced for disease incidence and mortality and health care costs. Utility of life estimates were sourced from an international registry and a meta analysis. In this paper, outcomes are reported for simulated subjects followed up for ten years after quitting smoking. Life-years, QALYs and costs were estimated with 0$408,000 in health care costs associated with AMI, COPD, lung cancer and stroke, and a corresponding saving of A$328,000 for every 1,000 female quitters. The average saving per 1,000 random quitters is A$373,000. Overall 40 of these quitters will be spared a diagnosis of AMI, COPD, lung cancer and stroke in the first ten years following quitting, with an estimated saving of 47 life-years and 75 QALYs. Sensitivity analyses indicated that QBM predictions were robust to variations of ± 10% in parameter estimates. CONCLUSION: The QBM can answer many of the questions posed by Australian policy-makers and health program funders about the benefits of quitting, and is a useful tool to evaluate tobacco control programs. It can easily be re-programmed with updated information or a set of epidemiologic data from another country

Risk and Uncertainty in the Cost Contingency of Transport Projects: Accommodating Bias or Heuristics, or Both?

Transport projects are regularly subjected to cost misperformance. The contingency set aside to cover any increases in cost due to risk and uncertainty issues is often insufficient. We review approaches that have been used to estimate a cost contingency. We show that some approaches such as reference class forecasting, which underpins the planning fallacy theory, take a biased view to formulate a contingency. Indeed, there is a perception that the risks and uncertainties that form the parts of a cost contingency cannot be accurately assessed using heuristics. The absence of an overarching theory to support the use of heuristics has resulted in them often being downplayed in a project's investment decision-making process. This article fills this void and provides the theoretical backdrop to support the use of heuristics to formulate a cost contingency. We make a clarion call to reconcile the duality of the bias and heuristic approaches, propose a balanced framework for developing a cost contingency, and suggest the use of uplifts to derisk cost estimates is redundant. We hope our advocacy for a balanced approach will stimulate debate and question the legitimacy of uplifts to solely debias cost estimates