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Room P3.10, Mathematics Building
Cristina Barros, Departamento de Engenharia do Ambiente, Escola Superior de Tecnologia e Gestão - Instituto Politécnico de Leiria
Real Time Statistical Process Control of the Quantity of Product in
Prepackages
In this presentation we will describe how we developed a
methodology for the statistical quantity control processes of
prepackagers and present a number of different case studies based
on the type of product, packaging, production, filling line and
system of data acquisition. With the aim of establishing a global
strategy to control the quantity of product in prepackages, an
integrated planning model based on statistical tools was developed.
This model is able to manage the production functions concerning
the legal metrological requirements. These requirements are similar
all around the world because they are based on the recommendation
R-87: 2004 (E) from the International Organization of Legal
Metrology (OIML). Based on the principles of Statistical Process
Control a methodology to analyze in real time the quantity of
product in prepackages was proposed; routine inspections, condition
monitoring of the main components and friendly comprehension of the
outputs were taken into account. Subsequently, software of data
acquisition, registration to guarantee traceability and treatment
for decisions which can be configured for any kind of filling
process was introduced. The impacts of this system, named ACCEPT-
Computer Based Help for the Statistic Control of the Filling
Processes, at the industry is demonstrated by the large number of
companies that are using this system to control their processes. In
Portugal, more than 50 companies and thousands of operators with
very low qualifications are working every day with SPC tools and
capability analysis in order to minimize variability and waste (for
example: over filling), to ensure compliance and to guarantee the
consumers rights.