Out-of-Level Result (Out-of-Limit Result)
Any unexplained deviation or result that failed to meet set levels for environmental monitoring and other utilities. (TR88)
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Out-of-Specification Result
Any unexplained deviation or the failure of a pharmaceutical ingredient, drug substance, or drug product batch to meet any of its regulatory-release and shelf-life specifications. (TR88)
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Ongoing Process Verification (OPV)
A formal plan to assure the process remains in its validated state during routine (post-PPQ) production and the process remains in a state of control (2, 3). (TR60-3)
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Original Record (MHRA)
The first or source capture of data or information, e.g., original paper record of manual observation or electronic raw data file from a computerised system, and all subsequent data required to fully reconstruct the conduct of the GXP activity. Original records can be static or dynamic.(TR80)
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Overkill Design Approach
A sterilization design approach where minimal information is required about the product bioburden. A worst-case bioburden assumption is used to determine the delivered lethality needed to achieve a PNSU of 10-6 on or in the items being sterilized. When using this approach, the qualification program must demonstrate that both the FBIO and FPHYS are greater than 12 minutes. The required lethality may vary regionally. (Note: For typical SIP systems, the FPHYS will need to be greater than the FBIO.) (TR01) (TR3) (TR30) (TR61)
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Outlet Pressure
The pressure exiting the downstream side of the filter. [Synonym: effluent or downstream pressure] (TR26)
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Operational Qualification (OQ)
Documented verification that the equipment or systems, as installed or modified, perform as intended throughout the anticipated operating ranges. (TR14) (TR61) (TR64) (TR72)
The documented verification that the facilities, systems and equipment, as installed or modified, perform as intended throughout the anticipated operating ranges. (TR54-5)
Documented verification that the equipment or systems, as installed or modified, perform as intended throughout the anticipated operating ranges (17). (TR60-3)
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Operating Parameters (Critical Parameters)
Values that are controlled and/or measured and are linked to safety and efficacy of a product or the process. Failure to meet a critical parameter should result in rejection of the load. (TR01) (TR3) (TR48) (TR51)
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Opportunity Costs
This is defined as the value of the next-best choice available when choosing between several mutually exclusive choices (e.g., the decision to expand a facility may result in losing the opportunity to invest the maintenance funds in the financial markets). Opportunity costs are often excluded from estimates of fixed operation costs because they can be difficult for comparative analyses in the overall decision process. (TR66)
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Over-the-Counter (OTC) Drug Products
Drug products sold in drug stores directly to customers without a physician’s prescription. (TR67)
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Optical Density (OD)
A unitless measure of the absorption of light of a given wavelength in media of a given path length. (TR41)
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Operating Parameters (Key Parameters)
Values that are controlled and/or measured and are used to assure the ongoing “state of control” and consistency of runs. Failure to meet a key process parameter should result in an investigation with a documented rationale for the disposition of the load. (TR01) (TR3) (TR51) (TR48) Values that are controlled and/or measured and are used to assure the ongoing “state of control” of steam in place cycles. Failure to meet a key process parameter should result in an investigation. (TR61)
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Operating Principle
Rules or concepts governing the operation of the system. (TR38)
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Operating Parameters
Values (e.g., time, temperature, pressure) that are controlled and/or measured that collectively define each phase of a sterilization cycle (e.g., heat-up, exposure, cool-down). (TR01) (TR3) (TR48) (TR61) An input variable (e.g., time, temperature, pressure) or condition of the manufacturing process that can be directly controlled. (Synonym: process parameter) (TR30) (TR51)
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Opportunistic Pathogens
Microorganisms responsible for infection in injured, invasively treated or immune-suppressed individuals that typically do not cause infection in healthy individuals, unlike frank pathogens. (TR67)
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Organohalogens
The major organohalogens or organic compounds containing chlorine, bromine or iodine of interest are halophenols and haloanisoles, especially 2,4,6 tricholorophenol (TCP), 2, 4, 6 tribromophenols (TBPs), 2, 4, 6 trichloroanisole (TCA), and 2, 4, 6 tribromoanisole (TBA). (TR55)
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Occurrence (O)
Probability that an event that leads to harm will occur. (TR54-2) (TR54-3)
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Online Observations
Observations or findings that are found during the processing of a product or products. (TR43)
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Occurrence
The likelihood that the cause of the failure will happen, resulting in harm to the patient. The likelihood that a unit operation that could potentially cause a failure, happens in such a way that does cause the failure. The FMEA rating scale that defines the frequency of a failure mode. (TR44)
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Objectionable Microorganism
According to 21 CFR 211.113 objectionable microorganisms can be: product related or recipient related. Please see glossary for "product related" or "recipient related" for additional information. (TR67)
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Odor Threshold
The lowest concentration of a compound detectable to 50% of the people tested. (TR55)
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Odor Perception
Odors are perceived through stimulation of receptor cells and nerve endings of the trigeminal nerve in the olfactory epithelium, which lie in a small area in the upper reaches of the nasal cavity. Odors are perceived directly through the nose (orthonasal) or during gestation when volatile odorous organaohalogens reach the olfactory centers through the nasopharyneal passage (retonasal). (TR55)
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Open System
(See system, open) (TR28)
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Operating Characteristic Curves
The operating characteristic curve shows the probability of acceptance (Pa) for any level of lot quality. (TR43)
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Occult Contamination
A cell culture contamination not immediately apparent by visual inspection or other obvious indicators. (TR50)
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