Value analysis of just-in-time demolition approach

The recent deconstruction approach for demolition projects promotes reusing and recycling materials. However, the demolition project is interrupted and slowed down while the project team wait for the waste exchange process. Wasted materials generated from the demolition project have to be stored on demolition site or extra depository. Cost and time might be lost for the inventory of wasted materials and products. Just-in-Time (JIT) is a matured method widely used in manufacture industry as well as construction industry. It is utilised to reduce the inventory of both raw materials and final products. It is also used to shorten production cycle and improve the quality of the products. The JIT philosophy can be applied into demolition project so that the inventory of wasted materials can be eliminated and the project time can be shortened. To implement JIT demolition, the waste exchange process can be performed before the wasted materials are generated from the project. Material owners and demanders can virtually plan for waste handling before the demolition project is physically implemented. As a result, waste materials can be sent to demanders through transportation right after they are produced from the project. Applying JIT philosophy in demolition projects can effectively reduce the inventory of wasted materials and the amount of demolition waste to be sent to landfills. Therefore the cost and time of the project are reduced, and the quality of final delivered materials is improved.

Web enabled just-in-time salvaged material management for demolition projects

The demolition activities of buildings produce numerous environmental pressures as a large proportion of demolition waste materials are sent to landfill directly in many projects. Web-based waste exchange systems could provide right solutions for releasing these pressures. Because the approaches adopted in current waste exchange systems are inefficient, these systems cannot generate waste exchange, not achieving their final goal, environmental protection. The Just-in-time (JIT) philosophy has been applied in the manufacture industry for decades and it is proven to be effective to eliminate or minimise inventory during production. This research aims to adopt the JIT philosophy into a demolition project management informapon system so that the system is more efficient in handling waste exchange. The system structure, key components and Just-in-time adoption are proposed and identified. Finally, a proto typed system is demonstrated.

Modeling a just-in-time plant using sequencing algorithms

An Australian automotive component company plans to assemble and deliver seats to customer on just-in-time basis. The company management has decided to model operations of the seat plant to help them make decisions on capital investment and labour requirements. There are four different areas in seat assembly and delivery areas. Each area is modeled independently to optimise its operations. All four areas are then combined into one model called the plant model to model operations of seat plant from assembly to delivery. Discrete event simulation software is used to model the assembly operations of seat plant.

Electronic waste exchange for just-in-time building demolition

Waste exchange is as a facilitator for construction and demolition waste deduction by reuse and recycling in construction projects. The just-in-time philosophy, which has been well cultivated in the manufacturing industry, is highly adoptable for demolition projects. Particularly, waste exchange that is usually performed after the actual demolition process can be shifted forward so that waste inventory from demolition is eliminated or reduced to facilitate waste reuse and recycling. A web-based waste exchange system is an ideal platform to enable communications among project participants before a demolition project commences so that waste materials can be sold before they are produced. Therefore, the productivity of the demolition project could be improved. This research paper aims to investigate and analyse the adoption of just-in-time philosophy in building demolition project management. It also describes the development of the proposed web-based waste exchange system that implements just-in-time demolition in detail, including its functionalities, information flows and major components.

Pocket books of engagement : a 'just-in- time' framework for a high quality first year student experience

This paper describes a 'just-in-time' engagement framework for a high quality first year experience ('FYE'). The concept 'just-in-time' refers to a student-centered timeline for a managed learning environment based on the week-to-week experiences faced by a first year student in an Australian University semester. The engagement framework detailed in this paper consists of a series of teaching strategies embedded as part of a designed, integrated and co-ordinated first year program, expanding on the transition blueprint of Nelson, Kift, Humphreys & Harper (2006), working within a transition pedagogy (Kift, 2008) and implementing an institutional-wide program of collaborative engagement. This paper discusses the application of this framework to a first year foundational unit in the Bachelor of Laws degree at Deakin University, Victoria, Australia, implemented as part of an embedded institutional-wide transition program.

Students use a 'just-in-time' approach to accessing online resources

Lecture notes and recordings, tutorial exercises, readings, study questions, revision quizzes, instructional videos and crosswords were provided online so that students who could not attend classes (flexible learners) were not disadvantaged. D2L's progress viewing tool was used to track student access to resources, class attendance was monitored, and a questionnaire asked about the value of the online resources for completing the unit. While students thought it was important to attend classes, attendance was low and centred on tutorials and practical's, rather than lectures. The main reason for non-attendance was employment. Students accessed most of the online resources immediately prior to tests rather than on a week-by-week basis. Both attenders and flexible learners indicated that lecture notes, readings, revision quizzes and study questions were the most useful resources. Attenders accessed online resources more than flexible learners. There was only a weak correlation between class attendance and successful completion of the unit.

Modelling and optimising operations of a plant using JIT philosophy

An Australian automotive component company plans to assemble and deliver seats to a car manufacturer on a "just-in-time" basis at its new plant. The research objective was to model seat assembly operations and apply Toyota goal chasing algorithm and user defined algorithm to balance workload among all the assembly workstations and areas.

A preliminary study on building demolition engineering and management

In recent years, building demolition has been challenging urban developers due to the increased incidence of demolition projects and the elevation of demolition requirements. The importance of building demolition is also recognised by researchers and, given its environmental impacts, it is anticipated to achieve the same attention as conventional planning, design,
construction and maintenance in the near future. In this article, the authors aim to develop a series of strategies for promoting building demolition practice. Environmentally-friendly demolition procedures are introduced through a waste minimisation decision that makes the approach on alternatives to demolition and an integrated demolition planning and design approach focus on a just-in-time (JIT) philosophy. A conceptual management framework is also presented for the implementation of demolition projects.

A framework for material management in the building demolition industry

Conventional mechanical building demolition produces numerous solid wastes, most of which are sent to landfill directly and severely degrade the living environment. Just-in-time building demolition has been developed recently with a management strategy to facilitate waste reuse. Procurement management plays a significant role in just-in-time building demolition. In particular, the demolition tendering selection needs to consider contractors' environmental performance in addition to project costs. Moreover, the flow of building materials in a demolition project may be regarded as a supply chain involving the building owner, demolition contractor and material demanders. This paper develops a framework for salvaged materials management in the emerging demolition industry. The research is to promote the recycling and reuse of building demolition materials in order to achieve better environmental and financial performance for building demolition projects.

Mcommerce - a vision in time

Global mCommerce revenues are expected to grow from $400 million in 2000, to 22.2 billion by 2005 (Raczkowski, 2002) mCommerce is a key driver in developing the global information society, with applications emerging in numerous areas including banking, financial services, security services and shopping (Khalifa and Cheng, 2002). With optimistic projections regarding its growth, many researchers are actively determining the future of mCommerce. In this paper, we have tried to synthesise some predictions and evolving definitions, explored security as a critical impediment and developing solutions; investigated the mPayment scenario; and derived a futuristic research framework. Specifically, we have attempted to capture the moving mCommerce scenario in present time, with a special focus into mPayments.