Installed instrumentation maintenance method

• US 7,280,925 B1
• Filed: 12/29/2004
• Issued: 10/09/2007
• Est. Priority Date: 04/02/2004
• Status: Expired due to Fees

• Current Assignee: Thomas Mcdonnell
• Original Assignee: the united states of america as represented by the secretary of the navy
• Inventors: Eker, Jeffrey T., Savage, Charles L., DiFilippo, Vincent L., Connolly, Margaret A., Egnak, Shawn A.
• Primary Examiner(s): Barlow; John
• Assistant Examiner(s): LE, JOHN H
• Application Number:
  US11/025,825
• Time in Patent Office: 1,014 Days
• Field of Search: 702/34, 702/182, 702/184, 702/185, 700/99, 701/29, 707/104.1, 714/43, 607/72
• US Class Current: 702/34
• CPC Class Codes: G06Q 10/06 Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
• CPC Class Codes: Y10S 707/99945 Object-oriented database structure processing
• CPC Class Codes: Y10S 707/99948 Application of database or data structure, e.g. distributed, multimedia, or image

Abstract

The present invention'"'"'s efficient and economical maintenance strategy for a system of operation (such as involving various kinds of instrumentation) features a unique decision-making logic that incorporates reliability-centered maintenance principles. The initial logical inquiry filters out the non-critical cases, i.e., those instruments the failure of which does not jeopardize or compromise safety, or the environment, or an important function or operation. The logical construct proceeds as to the remaining (unfiltered) instruments in a series of logical steps wherein the satisfaction of one or more given conditions by a subject instrument directs the practitioner to the appropriate maintenance action for the subject instrument. Possible maintenance actions include the following: comparison check of the instrument with respect to the primary instrument; system operational check; repair of the instrument; replacement of the instrument; maintenance deferral until a scheduled failure finding task; system calibration procedure; individual maintenance procedure (on-site or off-site).

Claims

1. A method for delimiting maintenance requirements for components of an operational system, said method comprising:

(a) designating, in written form, each component as being one of requiring maintenance action and not requiring maintenance action; and

(b) designating, in written form, each component that requires maintenance action as requiring one of (i) comparison check of the component with respect to the primary component of its kind, (ii) system operational check for the component, (iii) repair or replacement of the component, (iv) deferred maintenance action for the component, (v) system calibration procedure for the component, (vi) maintenance action for the component performed on-site per maintenance requirements card associated with the component, and (vii) maintenance action for the component performed off-site at a laboratory;

wherein a component requires maintenance action if failure of the component is unacceptable regarding at least one criterion selected from the group consisting of operational system function, safety, and environment; and

wherein a component that requires maintenance action requires;

comparison check of the component with respect to the primary component of its kind, if the component is neither the only component of its kind nor the primary component of its kind;

system operational check for the component, if the component is one of the only component of its kind and the primary component of its kind, the component is not quantitatively indicative, and failure of the component is not evident;

repair or replacement of the component, if the component is one of the only component of its kind and the primary component of its kind, the component is not quantitatively indicative, and failure of the component is evident;

deferred maintenance action for the component, if the component is one of the only component of its kind and the primary component of its kind, the component is quantitatively indicative, condition-based maintenance strategy suggests that maintenance action for the component is deferrable, and deferring maintenance action for the component until a scheduled failure-finding task is justified;

system calibration procedure for the component, if the component is one of the only component of its kind and the primary component of its kind, the component is quantitatively indicative, condition-based maintenance strategy suggests that maintenance action for the component is deferrable, deferring maintenance action for the component until a scheduled failure-finding task is not justified, and the component is part of a measurement chain;

system calibration procedure for the component, if the component is one of the only component of its kind and the primary component of its kind, the component is quantitatively indicative, time-based maintenance strategy suggests that maintenance action for the component is not deferrable, and the component is part of a measurement chain;

maintenance action for the component performed on-site per maintenance requirements card associated with the component, if the component is one of the only component of its kind and the primary component of its kind, the component is quantitatively indicative, condition-based maintenance strategy suggests that maintenance action for the component is deferrable, deferring maintenance action for the component until a scheduled failure-finding task is not justified, the component is not part of a measurement chain, and maintenance action for the component can be performed on-site;

maintenance action for the component performed on-site per maintenance requirements card associated with the component, if the component is one of the only component of its kind and the primary component of its kind, the component is quantitatively indicative, time-based maintenance strategy suggests that maintenance action for the component is not deferrable, the component is not part of a measurement chain, and maintenance action for the component can be performed on-site;

maintenance action for the component performed off-site at a laboratory, if the component is one of the only component of its kind and the primary component of its kind, the component is quantitatively indicative, condition-based maintenance strategy suggests that maintenance action for the component is deferrable, deferring maintenance action for the component until a scheduled failure-finding task is not justified, the component is not part of a measurement chain, and maintenance action for the component cannot be performed on-site;

maintenance action for the component performed off-site at a laboratory, if the component is one of the only component of its kind and the primary component of its kind, the component is quantitatively indicative, time-based maintenance strategy suggests that maintenance action for the component is not deferrable, the component is not part of a measurement chain, and maintenance action for the component cannot be performed on-site.

2. The method for delimiting maintenance requirements as defined in claim 1, wherein at least one said component requires maintenance action.

3. A computer program product for residence in memory of a computer, said computer program product being for prescribing individualized maintenance approaches for instrumentation implemented in the context of an operational system, said computer program product comprising a computer useable medium having computer program logic recorded thereon, said computer program logic including:

means for enabling establishment of instrument characteristics, said instrument characteristics including;

(a) the instrument is either the only instrument of its kind or the primary instrument of its kind;

(b) the instrument is neither the only instrument of its kind nor the primary instrument of its kind;

(c) the instrument is quantitatively indicative;

(d) the instrument is not quantitatively indicative;

(e) failure of the instrument is evident;

(f) failure of the instrument is not evident;

(g) condition-based maintenance strategy suggests that maintenance action for the instrument is deferrable;

(h) time-based maintenance strategy suggests that maintenance action for the instrument is not deferrable;

(i) deferring maintenance action for the instrument until a scheduled failure-finding task is justified;

(j) deferring maintenance action for the instrument until a scheduled failure-finding task is not justified;

(k) the instrument is part of a measurement chain;

(l) the instrument is not part of a measurement chain;

(m) maintenance action for the instrument can be performed on-site;

(n) maintenance action for the instrument cannot be performed on-site; and

means for enabling establishment of maintenance modes, said maintenance modes including;

(1) comparison check of the instrument to be performed with respect to the primary instrument of its kind;

(2) system operational check to be performed for the instrument;

(3) repair or replacement of the instrument to be performed;

(4) maintenance action for the instrument to be deferred;

(5) system calibration procedure to be performed for the instrument;

(6) maintenance action for the instrument to be performed on-site per maintenance requirements card associated with the instrument;

(7) maintenance action for the instrument to be performed off-site at a laboratory;

means for enabling establishment of characteristic-mode rules, said characteristic-mode rules including;

directing maintenance mode (1) for an instrument possessing instrument characteristic (b);

directing maintenance mode (2) for an instrument possessing instrument characteristics (a), (d), and (f);

directing maintenance mode (3) for an instrument possessing instrument characteristics (a), (d), and (e);

directing maintenance mode (4) for an instrument possessing instrument characteristics (a), (c), (g), and (i);

directing maintenance mode (5) for an instrument possessing instrument characteristics (a), (c), (g), (j) and (k);

directing maintenance mode (5) for an instrument possessing instrument characteristics (a), (c), (h), and (k);

directing maintenance mode (6) for an instrument possessing instrument characteristics (a), (c), (g), (j), (l) and (m);

directing maintenance mode (6) for an instrument possessing instrument characteristics (a), (c), (h), (l) and (m);

directing maintenance mode (7) for an instrument possessing instrument characteristics (a), (c), (g), (j), (l), and (n);

directing maintenance mode (7) for an instrument possessing instrument characteristics (a), (c), (h), (l), and (n);

means for enabling storage of information directing a said maintenance mode for each instrument to which said computer program logic is applied, said directing being in accordance with said characteristic-mode rules and including consideration of data specific to the instrument for which said maintenance mode is being directed, said data including data pertaining to said instrument characteristics.

4. The computer program product of claim 3, wherein:

said instrument characteristics include (o) failure of the instrument is not intolerable with respect to any of operational system function, safety, and environment;

said maintenance modes include (8) no maintenance action to be performed;

said characteristic-mode rules include directing maintenance mode (8) for an instrument possessing instrument characteristic (o).

5. A method for prescribing individualized maintenance approaches for instrumentation implemented in the context of an operational system, said method comprising:

establishing instrument characteristics including;

(a) the instrument is either the only instrument of its kind or the primary instrument of its kind;

(b) the instrument is neither the only instrument of its kind nor the primary instrument of its kind;

(c) the instrument is quantitatively indicative;

(d) the instrument is not quantitatively indicative;

(e) failure of the instrument is evident;

(f) failure of the instrument is not evident;

(g) condition-based maintenance strategy suggests that maintenance action for the instrument is deferrable;

(h) time-based maintenance strategy suggests that maintenance action for the instrument is not deferrable;

(i) deferring maintenance action for the instrument until a scheduled failure-finding task is justified;

(j) deferring maintenance action for the instrument until a scheduled failure-finding task is not justified;

(k) the instrument is part of a measurement chain;

(l) the instrument is not part of a measurement chain;

(m) maintenance action for the instrument can be performed on-site;

(n) maintenance action for the instrument cannot be performed on-site; and

establishing maintenance modes including;

(1) comparison check of the instrument to be performed with respect to the primary instrument of its kind;

(2) system operational check to be performed for the instrument;

(3) repair or replacement of the instrument to be performed;

(4) maintenance action for the instrument to be deferred;

(5) system calibration procedure to be performed for the instrument;

(6) maintenance action for the instrument to be performed on-site per maintenance requirements card associated with the instrument;

(7) maintenance action for the instrument to be performed off-site at a laboratory;

establishing characteristic-mode rules including;

directing maintenance mode (1) for an instrument possessing instrument characteristic (b);

directing maintenance mode (2) for an instrument possessing instrument characteristics (a), (d), and (f);

directing maintenance mode (3) for an instrument possessing instrument characteristics (a), (d), and (e);

directing maintenance mode (4) for an instrument possessing instrument characteristics (a), (c), (g), and (i);

directing maintenance mode (5) for an instrument possessing instrument characteristics (a), (c), (g), (j) and (k);

directing maintenance mode (5) for an instrument possessing instrument characteristics (a), (c), (h), and (k);

directing maintenance mode (6) for an instrument possessing instrument characteristics (a), (c), (g), (j), (l) and (m);

directing maintenance mode (6) for an instrument possessing instrument characteristics (a), (c), (h), (l) and (m);

directing maintenance mode (7) for an instrument possessing instrument characteristics (a), (c), (g), (j), (l), and (n);

directing maintenance mode (7) for an instrument possessing instrument characteristics (a), (c), (h), (l), and (n);

recording direction of a said maintenance mode for each instrument to which said computer program logic is applied, said direction being in accordance with said characteristic-mode rules and including considering data specific to the instrument for which said maintenance mode is being directed, said data including data pertaining to said instrument characteristics.

6. The method for prescribing individualized maintenance approaches as recited in claim 5, wherein:

said instrument characteristics include (o) failure of the instrument is not intolerable with respect to any of operational system function, safety, and environment;

said maintenance modes include (8) no maintenance action to be performed;

said characteristic-mode rules include directing maintenance mode (8) for an instrument possessing instrument characteristic (o).