College 5 (hoofdstuk 11 en 14 Ronald H. Ballou) Logistieke concepten College 5 (hoofdstuk 11 en 14 Ronald H. Ballou)
Supply scheduling decisions Purchasing scheduling decisions Network Planning Process
SUPPLY SCHEDULING Meeting demand: supply just when needed production (MRP) inventory replenishment (JIT)
Just in Time (I) Japanese production philosophy: Inventory reduction juiste producten, juiste tijdstip, juiste plaats, juiste kwaliteit, juiste hoeveelheid Inventory reduction “voorraad is smeermiddel van knelpunten” Production: small size and zero defects Relation with supplier omstel tijden verkorten om kleine series te kunnen maken.
Just in Time (II) KAN card: produce a standard quantity BAN card: bring a standard quantity KANBAN control on department level Demand approach, i.s.o. hierarchical approach
Just in Time (III)
Just in Time (IV) Concern level: Hierarchical approach Quartile planning with horizon of 4 month: purchase orders to suppliers Capacity control (long horizon) Assemblage schedule with adequate mix of models (aabbaabbbaa)
Material requirements planning (MRP I) demand forecasting from end-products planning the production of parts and materials bill of materials HPP : Hoofd productie programma
Bill of materials
Schedule MRP I bruto behoefte orders onderweg voorzien voorraad verloop netto behoefte geplande ontvangst geplande beschikbaar geplande orderuitgifte
Voorbeeld MRP I Variant met serie grootte
Problems MRP I demand uncertainty lead time uncertainty safety stock Manufacturing Resources Planning (MRP II) koppelt planning en besturing koppelt afdelingen
Position MRP I/II
Supply Chain Management Optimise the integral chain Integration of information Value Adding Logistics: functies die thuishoren in material management (assemblage, verpakken) verplaatsen naar de distributie keten Information technology
PURCHASING selecting and qualifying suppliers contracting comparing price, quality and service evaluating the received values quality of ‘your’ end-products
Purchase strategies purchase and percentage of sales value productie onderneming handelsbedrijf price reduction to all suppliers relation: more efficient production purchage on world wide web
NETWORK PLANNING where are the demand points ? where are the warehouses ? where are the source points? Good network brings savings
Data for network planning products in the product line locations materiaal, productie, opslag en services. costs customer service level capacity
Data sources and encoding Business planning documents Reports Logistic research Published information Encoding Product coding Geocoding
From data to information Product grouping Sales aggregation geografische clusters relatie cluster en verkoop concentratie
Design the network Chart, compass and ruler techniques Simulation models Heuristic models Optimization models regel van Camp
Opdracht 3: besturing Casus: “de internet super” Geef in een presentatie (per groep) een advies over een besturingssysteem