Improving Information Flow within the Production Management System with Web Services

The efficiency of the production planning and control process in construction depends significantly on the reliability and timely availability of resource information. The Last Planner system for production control mandates that a construction task should not be started unless all the seven resource prerequisites are in satisfactory condition. Failure to do so results in wasteful processes. However, this information is not readily available due to the lack of systems integration that prevails within the industry. Current implementations of the last planner system mostly rely on the team leaders‘ and foreman‘s ability to gather the required information for the weekly planning meetings and also for the look-ahead planning. However, much time is wasted chasing relevant information due to the above-mentioned problems. Also, the reliability of planning could be much improved if there is a system available, which aggregates resource information from various project stakeholders in one place. In such a situation, web services could provide an ideal platform for integration as they provide a flexible way to integrate disparate systems, with choreography based on identified business processes drawn from Last Planner and implemented using BPMN/BPEL. With the improvement in connectivity as a result of better availability of high speed Internet through mobile and fixed networks, there is a better opportunity for information integration through web services. A conceptual framework based on web services is put forward which aims to improve the information flow within the industry and provide the right information at the right time to enable better planning and control within the production system

Lean construction, building information modelling and sustainability

This paper investigates the mutual relations of three current drivers of construction: lean construction, building information modelling and sustainability. These drivers are based on infrequently occurring changes, only incidentally simultaneous, in their respective domains. It is contended that the drivers are mutually supportive and thus synergistic. They are aligned in the sense that all require, promote or enable collaboration. It is argued that these three drivers should be implemented in a unified manner for rapid and robust improvements in construction industry performance and the quality of the constructed facilities and their benefits for stakeholders and wider society

Addressing information flow in lean production management and control in construction

Traditionally, production control on construction sites has been a challenging area, where the ad-hoc production control methods foster uncertainty - one of the biggest enemies of efficiency and smooth production flow. Lean construction methods such as the Last Planner System have partially tackled this problem by addressing the flow aspect through means such as constraints analysis and commitment planning. However, such systems have relatively long planning cycles to respond to the dynamic production requirements of construction, where almost daily if not hourly control is needed. New solutions have been designed by researchers to improve this aspect such as VisiLean, but again these types of software systems require the proximity and availability of computer devices to workers. Given this observation, there is a need for a communication system between the field and site office that is highly interoperable and provides real-time task status information. A High-level communication framework (using VisiLean) is presented in this paper, which aims to overcome the problems of system integration and improve the flow of information within the production system. The framework provides, among other things, generic and standardized interfaces to simplify the “push” and “pull” of the right (production) information, whenever needed, wherever needed, by whoever needs it. Overall, it is anticipated that the reliability of the production control will be improve

Case Study on Design Management: Inefficiencies and Possible Remedies

Delivering better products with a reduced lead time and less resources has become the primary focus of design management. The aim of this work is to revisit typical design management inefficiencies and discuss possible remedies for these problems. To this end, a case study and interviews with seven Estonian architects were carried out. The data obtained was analyzed within the framework of the transformation-flow-value theory of production. Despite its failure to deliver customer value, a single-minded transformation view of operations has been the dominant approach taken in design management and processes, leading to inefficiencies in design practices

If CPM is so bad, why have we been using it so long?

Why has the Critical Path Method (CPM) been used so widely for so long given its inability to produce predictable outcomes? For shedding light on this paradox, the formative period of the CPM is analysed from two main angles. First, how was the CPM embedded into the construction management practice? Second, what was the methodological underpinning of the development of the CPM? These questions are researched through a literature review. In terms of embeddedness into practice, it turns out that the CPM morphed from being a way of production control, into a method for contract control. In consequence, the promotion of the CPM by owners has been crucial for pushing this method to be the mainstream approach to scheduling and production control. Regarding methodological underpinning, it turns out that the CPM was developed as a way of optimization, as part of the quantitative methods movement. This movement was largely based on the axiomatic approach to research. In good alignment with that approach, there was no attempt to empirically test quantitative models and their outcomes. In this context, the unrealistic assumptions and conceptualizations in CPM did not surface in forty years. These results are argued to be helpful in critical discussions on the role and merits of CPM and on the methodologies to be used in construction management research

Striving for Continuous Process Improvement - A Construction Case Study

Organisations must constantly monitor, measure, evaluate and improve their processes in order to remain competitive. Construction organisations are no different in this aspect and are increasingly realising the need for process improvement due to external and internal pressures. The construction industry is working towards improving its efficiency by implementing process improvement techniques such as Lean Construction along with information and communication systems. Business processes and information technology are closely associated and better results can be achieved by addressing them in an integrated manner. This paper provides details of a case study where an extensive business process improvement exercise was carried out over a period of five years alongside a major Enterprise Information System implementation. All major organisational units were assessed and its processes were modelled and evaluated with a view to improvement within the lean framework. Finally a continuous process improvement framework was put in place to avoid the risk of stagnation. The lean continuous improvement framework resulted in each organisational unit taking responsibility for their own processes ultimately leading to higher profitability and smoother supply chain processes. The case study also demonstrated that even smaller business units and its processes affected the overall value chain in a major way and the importance to analyse the process interdependencies between organisational units.Peer reviewe

Analysis Framework for the Interaction Between Lean Construction and Building Information Modelling

Building with Building Information Modelling (BIM) changes design and production processes. But can BIM be used to support process changes designed according to lean production and lean construction principles? To begin to answer this question we provide a conceptual analysis of the interaction of lean construction and BIM for improving construction. This was investigated by compiling a detailed listing of lean construction principles and BIM functionalities which are relevant from this perspective. These were drawn from a detailed literature survey. A research framework for analysis of the interaction between lean and BIM was then compiled. The goal of the framework is to both guide and stimulate research; as such, the approach adopted up to this point is constructive. Ongoing research has identified 55 such interactions, the majority of which show positive synergy between the two

Peripheral stent technology and current status for endovascular treatment of femoropopliteal artery disease: a clinical review

Over the past decade, the treatment of peripheral artery disease poses a number of technical challenges for the physician. The primary rationale of this article is to review the available literature on the current practices involved in the treatment of peripheral artery disease (PAD), particularly the femoropopliteal lesions. It is evident from the landmark clinical trials that the use of self-expanding drug-eluting stents (DES) has become the most favored clinical strategy for treating peripheral lesions above the knee. It is chiefly due to higher patency rates, and minimal in-stent restenosis and stent fracture rates associated with the use of DES. The technical evolution in the endovascular approach from the use of bare nitinol stents to DES for treating PAD and the factors responsible for this transformation have also been reviewed with their respective justification. Presently there is a need of DES technology for the treatment of femoropopliteal lesions, which can reduce the risk of stent fracture and in-stent restenosis for longer lesions while maintaining patency during long-term follow-up. To conclude, this review establishes that self-expanding DES and drug coated balloons using anti-proliferative drugs like sirolimus and paclitaxel are currently the most effective method of treating the femoropopliteal lesions in PAD

Impressive journey of TAVI so far, but miles to go

Valve replacement is mandatory for AS patients owing to its progressive nature leading to continuous valve degeneration. However, surgical replacement cannot be opted for majority of patients due to old age and affiliated co-morbidities. Over the recent years, AS treatment in high-risk patient population favors a newer, less-invasive method of transcatheter aortic valve implantation (TAVI). The main objective of this review is to revisit all the relevant aspects of TAVI to treat AS in high-risk patients and to assess its possibility as a first-line treatment approach even for low-risk AS patients. We searched PubMed, Google Scholar, Medline and ClinicalTrials.gov to identify all the relevant randomized controlled trials (RCTs) assessing the outcomes of TAVI vs. surgical mode of valve replacement. This method is found to be very safe and reproducible in many landmark clinical trials involving high-risk patients, demonstrating superior or, at least, comparable outcomes vs. surgical mode of treatment. This led to a trend of testing TAVI in lower-risk patient population as well to expand its treatment indication profile

Complexity in Designing Energy Efficient Buildings: Towards Understanding Decision Networks in Design

Most important decisions for designing energy efficient buildings are made in the early stages of design. Designing is a complex interdisciplinary task, and energy efficiency requirements are pushing boundaries even further. This study analyzes the level of complexity for energy efficient building design and possible remedies for managing or reducing the complexity. Methodologically, we used the design structure matrix for mapping the current design tasks and hierarchical decomposition of lifecycle analysis for visualizing the interdependency of the design tasks and design disciplines and how changes propagate throughout the system, tasks and disciplines. We have visualized the interdependency of design tasks and design disciplines and how changes propagate throughout the system. Current design of energy efficiency building is a linear and one-shot approach without iterations planned into the process. Broken management techniques do not help to reduce the complexit