{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,4]],"date-time":"2026-05-04T13:37:15Z","timestamp":1777901835039,"version":"3.51.4"},"reference-count":13,"publisher":"SAGE Publications","issue":"5","license":[{"start":{"date-parts":[[1997,11,1]],"date-time":"1997-11-01T00:00:00Z","timestamp":878342400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["SIMULATION"],"published-print":{"date-parts":[[1997,11]]},"abstract":"<jats:p>The throughput of clinical laboratories is determined by the \"case mix\" of the patients treated. Case mix is the mix of analyses determined by the types of patients treated at a hospital. This varies widely, as specific days may have different clinics. The assumptions made in order to use current simulators to model clinical laboratories (invariant case mix, superficial averaging of analyser performance, and indiscriminate scheduling) are no longer acceptable in a decision support system. A novel core engine that implements a \"hierarchical\" version of the discrete-event simulation approach, \"task trees,\" is presented. This addresses the fundamental problems of \"interlocking\" between tasks (both within and without jobshops) and the need to model at a detailed level, i.e., scheduling individual tests on analysers. This engine is currently being used to compare many different laboratory analysers in \"what if' scenarios.<\/jats:p>","DOI":"10.1177\/003754979706900501","type":"journal-article","created":{"date-parts":[[2007,3,18]],"date-time":"2007-03-18T03:46:49Z","timestamp":1174189609000},"page":"263-276","source":"Crossref","is-referenced-by-count":1,"title":["\"Task Trees\" \u2014 A Hierarchical Structure for Modelling Complex Jobshops"],"prefix":"10.1177","volume":"69","author":[{"given":"Ewan W.","family":"Crawford","sequence":"first","affiliation":[{"name":"University of Glasgow Department of Pathological Biochemistry Gartnavel General Hospital Glasgow, UK"}]},{"given":"Iain W.","family":"Percy-Robb","sequence":"additional","affiliation":[{"name":"University of Glasgow Department of Pathological Biochemistry Gartnavel General Hospital Glasgow, UK"}]},{"given":"Barry","family":"Clark","sequence":"additional","affiliation":[{"name":"University of Glasgow Department of Pathological Biochemistry Gartnavel General Hospital Glasgow, UK"}]}],"member":"179","published-online":{"date-parts":[[1997,11,1]]},"reference":[{"key":"atypb1","volume-title":"Simulation, A Statistical Perspective","author":"Kleijnen, J.","year":"1994"},{"key":"atypb2","volume":"113","author":"Connelly, D.P.","year":"1989","journal-title":"Archives of Pathological Laboratory Medicine"},{"key":"atypb3","volume-title":"\"WELCAN workload measurement system for pathology,\"","author":"Welcan.","year":"1990"},{"key":"atypb4","author":"Anthony, R.N.","year":"1988","journal-title":"Management Control in Non-Profit Organisations"},{"key":"atypb5","volume-title":"Stochastic Modelling and the Theory of Queues","author":"Wolff, R.W.","year":"1989"},{"key":"atypb6","doi-asserted-by":"crossref","DOI":"10.26481\/dis.19940317gm","volume-title":"Decision Support for Clinical Laboratories Capacity Planning","author":"Van Merode, G.G.","year":"1994"},{"key":"atypb7","volume-title":"Simulation Manual, Insight International, 21","author":"Genetik.","year":"1988"},{"key":"atypb8","volume-title":"Portable Multi-Tasking Operating System for use with the UNIX O.S","author":"Holbach, J.A.","year":"1988"},{"key":"atypb9","volume-title":"IEEE Standards D02","author":"Ethernet.","year":"1993"},{"key":"atypb10","volume-title":"Digital Simulation of a Laboratory for Structural Analysis, Doctoral Dissertation","author":"Van de Ginste, B.G.M.","year":"1980"},{"key":"atypb11","first-page":"236","volume":"14","author":"Carrol, A.","year":"1989","journal-title":"Medical Informatics"},{"key":"atypb12","volume-title":"Computer Simulation Techniques","author":"Naylor, T.H.","year":"1986"},{"key":"atypb13","doi-asserted-by":"publisher","DOI":"10.1080\/00140138008924746"}],"container-title":["SIMULATION"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/003754979706900501","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/003754979706900501","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T11:11:48Z","timestamp":1777633908000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.1177\/003754979706900501"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1997,11]]},"references-count":13,"journal-issue":{"issue":"5","published-print":{"date-parts":[[1997,11]]}},"alternative-id":["10.1177\/003754979706900501"],"URL":"https:\/\/doi.org\/10.1177\/003754979706900501","relation":{},"ISSN":["0037-5497","1741-3133"],"issn-type":[{"value":"0037-5497","type":"print"},{"value":"1741-3133","type":"electronic"}],"subject":[],"published":{"date-parts":[[1997,11]]}}}