ISO 15531-42:2005 産業オートメーションシステムと統合—産業製造管理データ—パート42：時間モデル | ページ 6

3.1.1

discrete manufacturing

production of discrete items.

[SOURCE: ISO 15531-1]

3.1.2

domain

collection of one dimension elements, that can be ordered and positionned applying a given measure method

Note 1 to entry: Since the purpose of this document is the description of a"time model" the restriction of"one dimension" element in the definition only applies to this document that excludes domain such as rectangle, triangle, cubes and spheres. Whithout the restriction to"one dimension" element the definition may apply to any kind of domain.

3.1.3

domain point

point in a domain

domain element for which any defined measure of it in the domain is zero

3.1.4

element

static representation of a part of the universe of discourse that may be identified and characterised by its behaviour and attributes

Note 1 to entry: A static representation is a snapshot of the part of the universe of discourse under consideration at a given time. It may include dynamic attributes as, for example, behaviour. Those attributes characterise the element as it is or as it is expected to be at a given time.

[SOURCE: ISO 15531-1]

3.1.5

entity

a class of information defined by common properties

[SOURCE: ISO 10303-11]

3.1.6

environment

part of the universe of discourse that does not belong to the system itself

3.1.7

event_occurrence

fact of an existence of a state at some point in time

Note 1 to entry: the point in time of the existence may not be known in term of calendar date before the event_occurrence actually happens. One reason, why the event_occurrence cannot always be expressed as a calendar date, is that the event_occurrence is not possible to plan, for example a breakdown of machine.

[SOURCE: ISO 10303-41ed2 clause 16.4.7]

3.1.8

flow

motion of a set of physical or informational objects in space and time

[SOURCE: ISO 15531-1]

3.1.9

flow control

specific production control system that is based primarily on setting production rates and feeding work into production to meet these planned rates, then monitoring and controlling production.

Note 1 to entry: That includes the act of checking and driving the flow according to a given purpose. The term may also apply to the function or service.

3.1.10

duration

interval of time

length of a period of time, measured using a given unit of time

Note 1 to entry: interval of time measures the distance between two points in time. In that case it is the length of the time domain that is bounded by the two points in time under consideration.

3.1.11

measure

result of a quantitative evaluation of a given property of any physical or mathematical object

Note 1 to entry: the term measure may also be utilised for the operation that leads to this result.

Note 2 to entry: any measure implies the definition of a method (procedure, theory) to get it, that includes the definition of the correponding unit of the measure. In particular any measure of an interval of time shall imply the definition of a unit of time and shall refer to it.

Note 3 to entry: From a mathematical point of view a measure is sometimes defined as a way to determine the distance between two points of the space under consideration (the length of the segment that joint these two points) as well as the result . In that sense duration is the measure of a period of time.

Note 4 to entry: For information the generic mathematical definition of the measure is: nonnegative function of subsets of a space completely additive in the sense that the measure of the union of a sequence of mutually disjoint sets is the sum of the measures of the sets.

3.1.12

method of measure

set of rules and intermediate steps, including the definition and the use of a unit of measure to be observed to achieve the considered measure

Note 1 to entry: Methods of measure often result from theories and principles that implicitly or explicitly derive from mathematical theories of the measure theories and from theoritical or experimental considerations on the property to be assessed.

Note 2 to entry: Mathematical theory of the measure theory is the study of measurable sets and functions, introduced by Lebesgue in order to generalize the Riemann integral.

3.1.13

point in time

location of something noticeable within a time domain

Note 1 to entry: another equivallent definition may be: point in the time domain, applying definition 3.4.1 and 3.4.2 to the time domain

3.1.14

scheduling

act, function or result of planning occurrences of manufacturing activities

3.1.15

time

feature of the enterprise universe of discourse that enables the location of noticeable things along an infinite oriented axis and allows the ordering of their succession or the identification and characterisation of this succession

Note 1 to entry: Two main enterprise entities are related to the time. The first one is the point in time that enables the identification or assessment of location along the time axis. The second one is the interval of time that enables the determination of the distance between two points in time. See ISO 15531-31 annex D and IEC 62264-1 annex F.

3.1.16

time domain

period

set of points in time

Note 1 to entry: A time domain may be finite or infinite. It may be bounded or not by one or two points in time.

Note 2 to entry: A time domain may be composed of other time domains.

3.1.17

time_interval

Identification of an intervening time

[SOURCE: ISO 10303-41ed2 clause 16.4.14]

3.1.18

time model

model of the enterprise environment feature"time"

[SOURCE: ISO 15531-1]

3.1.19

unit of time

unit, that is implicitly or explicitly a multiple of the internationally defined second, to which a measure of time in a time domain has to refer

Note 1 to entry: in other words unit of time is the quantity of time chosen as a reference in terms of witch other quantity of time may be expressed. The second is the unit of time defined in the SI system of units.

Note 2 to entry: the multiplication ratio may be either greater or smaller than one.

3.1.20

universe of discourse

the collection of concrete or abstract things that belong to an area of the real world, selected according to its interest for the system to be modelled and for its corresponding environment

[SOURCE: ISO 15531-1]