Principios del mantenimiento

BULETIN ŞTIINŢIFIC, Seria C, Volumul XXIV, Fascicola: Mecanică, Tribologie, Tehnologia Construcţiilor de Maşini
SCIENTIFIC BULLETIN, Serie C, Volume XXIV, Fascicle: Mechanics, Tribology, Machine Manufacturing Technology
ISSN 1224-3264

PRINCIPLES OF THE MAINTENANCE
MANAGEMENT
Nicolae UNGUREANU1, Miorita UNGUREANU2, Adriana COTETIU1,
Branimir BARISIC3, Sorin GROZAV4
1,3,4

Prof. PhD.Eng., 2Assoc. Prof. PhD. Eng.
North University of Baia Mare, Department of Industrial Systems and
Management, Dr. V. Babes Street,62A , RO-430083, Romania,
Phone: +40-362-401265, E-mail: nicolae.ungureanu@ubm.ro
3
Faculty of Egineering, University of Rijeka, Vukovarska 58, Rijeka, Croatia
4
Technical University of Cluj-Napoca, Department of Machine Building Technology, Faculty of MachineBuilding
1,2,3

Abstract: In present, in world, in all domains working many machinery and equipments day by day more complex. The
people depends by technical and economical characteristic of machinery and equipments with one condition: the
machinery and equipments must work. To keep working machinery and equipments is necessary to be included in some
maintenance system. The paper presents someaspects of the most used maintenance systems.
Keywords: maintenance, corrective, preventive, current functional, predictive, palliative

1. INTRODUCTION
In the last century maintenance of machinery and equipment was a challenge. The challenge was
(and remain) to maintaining machinery and equipment in function at nominal parameters (technical, safety,
etc.) in optimum economical conditions.This mind low number of personal involved in maintenance actions,
reduced time of maintenance operations, low founds but without any compromising’s regarding the
functioning and safety parameters. To achieve this target was perfected more maintenance systems each with
advantages and disadvantages. The difficulty is to choose the best maintenance system according the
particular conditions ofmachinery and equipment used.

2. MAINTENANCE SYSTEMS
The maintenance systems have all the same end objective: mission-ready machinery and equipment
at minimum cost. This end objective can be touched using different ways. Some systems try to keep working
machinery and equipments under the pressure of production. These systems have as single objective to
rapidly restore the equipment to itsoperational readiness state using available resources. Another’s systems
have the same main objective but this main objective is associate with another’s as: improve maintenance
operations, reduce the amount and frequency of maintenance, reduce the effect of complexity, reduce the
maintenance skills required, reduce the amount of supply support, establish optimum frequency and extent of

69BULETIN ŞTIINŢIFIC, Seria C, Volumul XXIV, Fascicola: Mecanică, Tribologie, Tehnologia Construcţiilor de Maşini
SCIENTIFIC BULLETIN, Serie C, Volume XXIV, Fascicle: Mechanics, Tribology, Machine Manufacturing Technology
ISSN 1224-3264

preventive maintenance to be carried out, improve and ensure maximum utilization of maintenance facilities,
and improve the maintenance organization.
Forunderstanding the most used maintenance systems (fig. 1) is necessary to define some terms[2],[3]:

Fig. 1 Maintenance systems

•

Maintenance: ensemble of technical and management actions appropriate for retaining an
item/part/equipment in, or restoring it to a given condition.

•

Reliability: The probability that an item will perform its stated function at nominal
parameters forthe desired period when used per the specified conditions.

•

Maintainability: The probability that a failed item will be restored to adequately working
condition.

•

Preventive maintenance: All actions carried out on a planned, periodic, and specific
schedule to keep an item/equipment in stated working condition through the process of
checking and reconditioning. These actions are...