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Investigating different types of variability in food production systemNoorwali, Ammar January 2016 (has links)
A high level of competition in the food industry, specifically in the Middle East and the UK has forced companies to improve their processes by reducing lead time, waste, and costs and increasing production efficiency. The main challenge to the achievement of the process improvement objectives is the high level of process variability. Therefore, this research investigates the different types of variability in food production system and proposes a methodology to reduce the effect variability in food production system. The variability can be caused by several factors, for instance, in biscuit production lines variability can be induced due to short breakdown and long breakdown, variable processing times, variable temperature, etc. The proposed approach addresses process time variability issues associated with both make-to-stock (MTS) and make-to-order (MTO) manufacturing environments using an iterated approach. The proposed methodology integrates process mapping, (which is a lean tool for identifying value added and non-value added activities), discrete event simulation (to mirror the real production line), Taguchi orthogonal arrays (to generate different scenarios in order to investigate the effect of variability on the simulation model), correlation analysis (to identify the highest variability factors), and the rule based system (to improve food production system performance based on identified key performance indicators (KPIs)). The research uses a biscuit production line as a case study to validate the proposed methodology. The application of the proposed approach determines that the highest effected KPI is %working. The results showed that after implementation of the rule-based system, key performance improved in high variable areas. Results analysis based on before scenario shows that %working performance indicator is highly effected by variable temperature, speed, and breakdown factors for high variable areas such as baking, cooling, aligning, and packing. Based on identified factors and high variable areas, rules are developed by applying standardisation setting (SOP, WI, PP) in high variable areas and the results shows %working improved in baking by 4.78%, in cooling by 16.06%, in aligning by 0.35%, in packing machine1 by 2.5%, in packing machine2 by 2.37%, in packaging1 by 3.35%, and in packaging2 by 3.16%. The integrated method allow quick response , control the environment without production interruption, reduce number of experiments , and reducing variability in high variable areas, which narrowed the improvement in the required areas and increased its effectiveness.
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Reducering av kapitalbindning hos producerande SME:sLindström, Marcus, Makushenko, Anton January 2022 (has links)
Introduktion: Små till medelstora företag (SME) innefattar 99.9% av alla aktiva verksamheter i Sverige. SME:s är företag som har begränsade ekonomiska resurser. Begränsade resurser kan leda till att verksamheter producerar produkter till lager i rädslan om att gå miste om leveranser, vilket skapar ett uppbundet kapital i färdigvarulagret. Syftet med studien är att undersöka om make to order (MTO) kan användas av SME:s för att reducera kapitalbindning i färdigvarulagret och undersöka vilka utmaningar det finns med att implementera MTO. FF1: Hur kan MTO användas som ett verktyg för att reducera kapitalbindningen hos SME:s? FF2: Vilka utmaningar finns det med att implementera MTO för SME:s? Metod: En fallstudie har genomförts hos ett producerande mikroföretag. Data har samlats in genom observationer, intervjuer och dokument. För grund till den teoretiska referensramen har en litteraturstudie genomförts. Litteraturstudien samlade in data genom vetenskapliga artiklar och böcker som har använts för att analyser den insamlade empirin från fallstudien. Resultat: Studiens resultat har kommit fram till att MTO kan användas som ett verktyg hos SME:s som har en hög kapitalbindning och inte kan utesluta ett färdigvarulager. För att reducera kapitalbindningen kan därmed en hybrid mellan MTO och MTS (make to stock) användas. Studien har ytterligare kommit fram till att det finns tre huvud utmaningar med att implementera MTO. De tre utmaningarna är ställtider, oförutsägbara händelser och förändringar.
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