TY - CONF TI - Just-in-Time Concrete Delivery: Mapping Alternatives for Vertical Supply Chain Integration C1 - Berkeley, California, USA C3 - 7th Annual Conference of the International Group for Lean Construction SP - 97 EP - 108 PY - 1999 AU - Tommelein, Iris D. AU - Li, Annie En Yi AD - Associate Professor, Constr. Engr. and Mgmt. Program, Civil and Envir. Engrg. Department, 215-A McLaughlin Hall, Univ. of California, Berkeley, CA 94720-1712, 510/643-8678, FAX 510/643-8919, tommelein@ce.berkeley.edu AD - Senior (B.S. Degree), Constr. Engr. and Mgmt. Program, Civil and Envir. Engrg. Department, 215-A McLaughlin Hall, Univ. of Calif., Berkeley, CA 94720-1712, 510/536-1782, annieli@uclink4.berkeley.edu AB - This paper explains concepts underlying a just-in-time production system. Just-in-time production systems as implemented by Toyota are pull systems in which ‘kanban’ convey the need to replenish the right inventory at the right time and in the right amount. In this paper, symbols from manufacturing are introduced to map resource flows in order to help distinguish traditional- from lean production processes. These symbols are then applied to construction. Ready-mix concrete provides a prototypical example of a just-in-time construction process. Ready-mix concrete is a perishable commodity, batched to specifications upon customer demand. This makes just-in-time delivery necessary. Based on data from industry case studies, alternative forms of vertical supply chain integration were investigated. The most common one is where the batch plant also delivers the mix to the contractor’s project site. An alternative is for the contractor to haul the mix from the batch plant to the project site with their own revolving-drum trucks. One alternative is favored over the other depending on the amount of control the contractor wants in terms of on-time site delivery of concrete and the variability in the contractor’s demand for concrete project after project. Insights can be gained from these two examples on how the construction industry has adopted a just-in-time production system for at least one part of the concrete supply chain. The examples provided will help the reader think through issues pertaining to the need for having information, materials, and time buffers at strategic locations in construction processes. KW - Supply-chain mapping KW - vertical supply-chain integration KW - ready-mix concrete KW - pull-driven scheduling KW - just in time KW - JIT KW - kanban KW - lean construction. PB - T2 - 7th Annual Conference of the International Group for Lean Construction DA - 1999/07/26 CY - Berkeley, California, USA L1 - http://iglc.net/Papers/Details/86/pdf L2 - http://iglc.net/Papers/Details/86 N1 - Export Date: 29 March 2024 DB - IGLC.net DP - IGLC LA - English ER -