Antonio de Pádua Wagemaker Prof. Dr. José Vicente Caixeta ... · Prof. Dr. José Vicente...
Transcript of Antonio de Pádua Wagemaker Prof. Dr. José Vicente Caixeta ... · Prof. Dr. José Vicente...
Prof. Dr. José Vicente Caixeta-FilhoUniversity of São Paulo, BRAZILE-mail: [email protected]
Jan Maarten van Swaay-NetoInterativa S/C Ltda., BRAZILE-mail: [email protected]
Antonio de Pádua WagemakerWagemaker Consultoria Ltda., BRAZILE-mail: [email protected]
Johannes Petrus Wulfram de WitJan de Wit Co., BRAZILGeneral Manager and Owner
Marcelo Moraes Jan de Wit Co., BRAZILProduction and Sales Manager
OUTLINE OF THIS PRESENTATIONOUTLINE OF THIS PRESENTATION
• introducing Jan de Wit Co. • understanding the lily business chain• the main results obtained• the DSS and the transferability issue• testimonies: producer and competitors• concluding remarks
BULB PRODUCER
BULB WHOLESALER
FLOWER PRODUCER
WHOLESALE MARKETPLACE
FLOWER WHOLESALER
FLOWER RETAILER
FINAL CUSTOMER
-- auction room auction room --
-- from bulbs to flowers from bulbs to flowers --
SPACING
PREPARARING BULBS PLANTING
HARVESTING PACKING
ROOTING
RECEIVING BULBS
DELIVERING FLOWERS
• exploite market opportunities, respecting operational and technical restrictions;
• manage trade and production cycles: how to plan, do, check and respond;
• purchase the right bulbs: varieties, bulb sizes and quantities per size.
50%22.5%15.1%Return on owners equity26%15.5%12.3%Income from operat. (% of sales)
60%495,243309,546Income from operations (R$)
∆∆∆∆ (%)20001999
25.8%3,229,5422,566,800Total Revenue (R$)8.2%5.565.14Unit average price (R$)39.9%1,585,9841,133,925Revenue (R$ )29.3%285,088220,469Quantities (units)
Bundles0%3.393.39Unit average price (R$)
14.7%1,643,5581,432,875Revenue (R$)14.8%484,722422,208Quantities (units)
Pots∆∆∆∆====(%)20001999
60%Income from operations
18%Fixed costs
32%Contribution margin
23%Variable costs
26%Revenue
∆ (2000 / 1999)
OBJECTIVE :• maximization of the farm’s “total contribution margin”
CONSTRAINTS TO BE CONSIDERED:
• bulb inventory
• characteristics of the production cycle’s duration
• technical requirements (number of bulbs per pot or box, spacing to be followed)
• usage limitations for each type of greenhouse
• market requirements (selling unit, minimum number of buds and minimum number of stems per bundle or pot)
• upper and lower market-defined sales’ limits
STRUCTURE OF THE STRUCTURE OF THE LPLP MODELMODEL
NUMCANTjvgil = total of flowerbeds, in a specific greenhouse, originated from a specific bulb batch j, from a specific lily variety v, for a specific use g (e.g., potting flower or cutting flower), taking into consideration the pertinent planting week i and the expected harvesting week l.
MAIN DECISION VARIABLEMAIN DECISION VARIABLETO BE CALCULATEDTO BE CALCULATED
GENERAL STRUCTURE OF THE DECISION GENERAL STRUCTURE OF THE DECISION SUPPORT SYSTEMSUPPORT SYSTEM
STOCK OFBULBS
STOCK OF BULBS
PRODUCTIONCYCLE
BULB ANDPRODUCTION
COSTS
CURRENTPLANTINGS
AVAILABILITYOF
FLOWERBEDS
ESTIMATEDSALES
GENERATION OF “TXT” FILES
OPTIMIZATION MODEL(GAMS)
OPTIMALSOLUTION
NO
YES
GENERATION OF “TXT” FILES
FLOWERBEDOCCUPATIONESTIMATES
FINANCIALRESULT
ESTIMATES
STOCKLEVEL
ESTIMATES
PRODUCTIONPLAN
SUGGESTED
35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50Weeks
Production cycle Bulb and production costs
Estimated sales
Current plantings and availabilty of flowerbeds
Stock of bulbs
Planning horizon
G e n e r a l A l g e b r a i c M o d e l i n g S y s t e m04/10/01 15:46:00 PAGE 2Model Statistics SOLVE FLORES USING LP FROM LINE 40902GAMS 2.50A Windows NT/95/98MODEL STATISTICSBLOCKS OF EQUATIONS 31 SINGLE EQUATIONS 114767BLOCKS OF VARIABLES 19 SINGLE VARIABLES 416554NON ZERO ELEMENTS 1352820GENERATION TIME = 90.190 SECONDS 70.1 Mb WIN-18-097EXECUTION TIME = 90.190 SECONDS 70.1 Mb WIN-18-097S O L V E S U M M A R YMODEL FLORES OBJECTIVE MC
TYPE LP DIRECTION MAXIMIZESOLVER OSL FROM LINE 40902
**** SOLVER STATUS 1 NORMAL COMPLETION**** MODEL STATUS 1 OPTIMAL**** OBJECTIVE VALUE 2059733.0996RESOURCE USAGE, LIMIT 2409.578 1000000.000ITERATION COUNT, LIMIT 6172 1000000
OSL Version 1 Jul 4, 1999 WIN.OS.18.1 055.035.036.WAT OSL Version 1
Model dimensions
SINGLE EQUATIONS 114.767SINGLE EQUATIONS 114.767SINGLE VARIABLES 416.554SINGLE VARIABLES 416.554
Flowerbed occupations
Stock levelsProduction plan
Financial re-evaluation
Sale re-evaluation
Prof. Dr. José Vicente Caixeta Filho
José Vicente Caixeta FilhoJosé Vicente Caixeta Filho
JanJan Maarten van Swaay Maarten van Swaay NetoNeto
Ricardo Luis LopesRicardo Luis Lopes
José Vicente CaixetaJosé Vicente Caixeta--FilhoFilho
JanJan Maarten van SwaayMaarten van Swaay--NetoNeto
Antonio Antonio WagemakerWagemaker
OPTIMIZATION OF OPTIMIZATION OF THE PRODUCTION THE PRODUCTION
PLANNING AND PLANNING AND TRADE OF TRADE OF
CHRYSANTHEMUMCHRYSANTHEMUMFLOWERS AT FLOWERS AT
SCHOENMAKER SCHOENMAKER CO.CO.
• the still not very traditional environment (= Agriculture) for an O.R. application• the still not very traditional country (= BRAZIL) for a well succeded O.R. application• the size and specific type of business• the use (and success) of an LP model• the friendly interfaces of the DSS• the quantifiable benefits• the transferability potential• the complete knowledge cycle
(classroom → business → Edelman → classroom)
CONCLUDING REMARKSCONCLUDING REMARKS