2 Please find in this catalogue, the core stock range which New Zealand Insulators is offering in Since 1924, NZI has supplied power protection products to New Zealand s electrical distribution networks. It is shown that a systematic buffered construction schedule can decrease project delivery time by 31% to 41%, and increase productivity level up to 30% when combines with variation mitigation strategies such as " Last Planner System ". Consequently, waste in the form of waiting time or slow work can be minimised which addresses the Lean ideal requirements. The improvement is apparent where considerations are given to the probable non-alignment between the planned and the actual progresses. A systematically buffered schedule can improve the reliability of construction plans. This paper discusses the use of a Lean-driven buffered schedule in improvement of productivity in construction. Variability and buffer management are also key topics in the lean construction agenda as reduction in variability effects can decrease the non-value-adding components in production. Buffers are commonly used to protect production schedules against the variations by allowing a certain level of flexibility. Variability causes instability and fluctuations in different performance measures such as cycle times, cost, and planning efficiency. This issue represents almost 80% of productivity reduction in repetitive construction projects. One of the factors which largely affect productivity in construction is variability. However, the sector is plugged with problem in poor productivity level. The building and construction sector accounts for more than 4% of New Zealand's Gross Domestic Product (GDP).
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