Ramentorin käyttövarmuusohjelmistoihin keskeisesti liittyviä konferenssi- ja seminaarijulkaisuja
Integrated Business and Technical Product Reliability Design
Virtanen S, Tampere University of Technology
BRED-projektin seminaari (Elektroniikan tutkimuksen ja kehityksen yhteistyöelin KOTEL ry)
Espoo
31 December, 2008
"The traditional and still dominating method for product design is focused on optimising the
technical performance of a product. The reason for this is simple, there is no easily available
and comprehensive design method or tool to integrate the reliability and maintainability
(R&M) considerations and effects in product design. As more the companies’ management have experienced the meaning of Product’s R&M as
competitive factors in their business, as more they have started to invest R&M engineering
and development. This was also a starting point from where this project was launched."
Product Reliability and Availability in Field Data
Nevavuori L, Service Development, KONE Corporation
Proceedings of the 3rd World Congress on Engineering Asset Management
and Intelligent Maintenance Systems (WCEAM-IMS 2008)
Beijing, China
27-30 October, 2008
"Demands for the dependability have risen in the elevator industry during the recent years. The aim of the paper is
to introduce a case study that was performed by KONE’s reliability and maintenance departments in the
beginning of year 2007. The case is about products’ perceived dependability follow-up. Moreover, a target is to
present how reliability data was collected as well as utilized in reliability centered maintenance planning. In this
case the starting point for a dependability follow-up was the back reported field data from maintenance actions."
Simulation and Calculation of Reliability Performance and Maintenance Costs
Hagmark P-E, Ph.D., Tampere University of Technology
Virtanen S, Ph.D., Tampere University of Technology
Annual Reliability and Maintainability Symposium (RAMS)
Orlando, FL, USA
22-25 January, 2007
"Our model for the simulation and calculation of reliability performance and maintenance costs is based on a generalized fault tree approach, where the TOP represents the product to be designed. The fault tree consists of entities, which essentially affect the failure tendency and the repair time of the product. The relations between entities are modeled by two mechanisms. The “gates” determine the partly logical and partly stochastic propagation of faults (primary states). The “strategies” define other relations between TOP and the deepest entities. A consequence of the strategies is that two types of “waiting” (secondary states) can occur."
Risk evaluation of a spare part stock by stochastic simulation
Hagmark P-E, Ph.D., Tampere University of Technology
Pernu H, M.Sc., Tampere University of Technology
ESREL 2006 Conference, Safety and Reliability for Managing Risk
Estoril, Portugal
18-22 September, 2006
"Spare part inventories are necessities in keeping equipment in operating condition. The design of a spare part inventory is risk management by nature. It is a multi-phase task to meet the associated economical and technical requirements. A typical target is to optimize the size of the stock by balancing the costs against the stock-out risk. This paper is a brief presentation of an effort toward a broad-based methodology. Our model can be characterized as a simulation-calculation scheme that connects organically inventory design, process redundancy, maintenance policy, spare part reliability & demand, and shortage & cost accounting. The multitude of variables and concepts in our model enables a vast number of interpretations. Since the sub-models imitate the reality in time order, the model is easy to extend when new knowledge or new features need to be taken into account. The corresponding and still developing software extends continuously the applicability. At present, a tool for the optimization of selected cost combinations has been implemented."
Modeling and analysis of causes and consequences of failures
Virtanen S, Ph.D., Tampere University of Technology
Hagmark P-E, Ph.D., Tampere University of Technology
Penttinen J-P, M.Sc., Tampere University of Technology
Annual Reliability and Maintainability Symposium (RAMS)
Newport Beach, CA, USA
23-26 January, 2006
"Modeling and analysis of causes and consequences of
failures form a foundation for quantitative investigation of the
reliability, safety and risks related to a design entity. The
general term “entity” or “design entity” can stand for function,
system, equipment, mechanism, or any kind of part."
Specification and Allocation of Reliability and Availability Requirements
Hagmark P-E, Ph.D., Tampere University of Technology
Virtanen S, Ph.D., Tampere University of Technology
Annual Reliability and Maintainability Symposium (RAMS)
Newport Beach, CA, USA
23-26 January, 2006
"This paper presents, a computer-supported method for
specifying reliability, repair time, and availability
requirements for a product and allocating them into the
product’s design entities. The general term “entity” can stand
for function, system, equipment, mechanism, or any kind of
part."
Todennäköisyyspohjainen käyttövarmuuden ja kunnossapidon
suunnittelu
Pernu H, DI, Tampereen teknillinen yliopisto
Automaatio 2005 Seminaari
Suomen Automaatioseuran julkaisusarja nro 28
2005
"Tampereen teknillisessä yliopistossa on useiden vuosien ajan kehitetty todennäköisyyspohjaisia käyttövarmuuden
ja kunnossapidon suunnittelumenetelmiä. Kehitetyt menetelmät perustuvat stokastiseen simulointiin, jossa
matkitaan ”reaaliajassa” satunnaisotoksilla osien vikaantumista ja korjaamista sekä muita tutkittavia tapahtumia."
Reliability Engineering and Maintenance in Finnish Industry
Virtanen S, Ph.D., Tampere University of Technology
July, 2005
"New product liability legislation, enhanced competition, and economizing on expenditures
have lent increased importance to technical considerations of reliability and maintainability in
product design. A product’s reliability and maintainability (R&M) are quality characteristics
to which where customers attach great importance when forming an opinion of product’s
overall quality. It is especially important to understand that these are precisely the
characteristics whose design flaws cannot be fixed during manufacturing or operation. In fact
we might say that it is in the product design phase where the fundamental decisions are made
to set the product’s quality maximum and cost minimum. A company that has a good control
of the R&M performance for its products has a considerable competitive advantage both in
the case of design and manufacturing consumer products and when negotiating about
availability contracts for large industrial systems."
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