یک مخففی هست که در متون تخصصی دیده میشود به معنی بهره برداری و نگهداری هست که تعریف کامل و جامع ان به انگلیسی که از سایت Chandra Asri برداشت کردم بدین گونه هست :
Operation and maintenance is a combination of budgeting, training, management, and maintenance to make sure that the facilities work as they are designed. O&M is a process involving safety standard inspection, daily task optimization, and coordination to maintain assets
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