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MetricsEmsMeasureDistribution
(24 Sep 2010,
ArthurRyman
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(raw view)
---+ ems:MeasureDistribution Metric entities: [[MetricsEmsMeasure][ems:Measure]], [[MetricsEmsMeasureDistribution][ems:MeasureDistribution]], [[MetricsEmsFactTable][ems:FactTable]], [[MetricsEmsFactDistributionTable][ems:FactDistributionTable]], [[MetricsEmsMap][ems:Map]], [[MetricsEmsWorkBreakdownStructure][ems:WorkBreakdownStructure]] %TOC% ---++ Description A measure distribution is like a [[MetricsEmsMeasure][measure]] except that it gives a probability distribution for the numeric value of a measure instead of a precise numeric value. Measure distributions are used in scenario assumptions (see [[MetricsEmsScenario#ems_assumes][ems:assumes]] and [[MetricsEmsScenario#ems_assumesTable][ems:assumesTable]]) and estimate predications (see [[MetricsEmsEstimate#ems_predicts][ems:predicts]] and [[MetricsEmsEstimate#ems_predictsTable][ems:predictsTable]]). ---++ Properties An ems:Measure resource has the following properties: | *Property* | *Range* | *Type* | *Occurrence* | *Edits* | *Description* | | dcterms:title | datatype | xhtml:span | exactly-one | read-write | A brief title for the measure. | | ems:metric | resource | rdf:Resource | exactly-one | read-write | A URI that identifies the metric. | | ems:unitOfMeasure | resource | rdf:Resource | exactly-one | read-write | A URI that identifies the unit of measure. | | ems:distribution | local inline resource | [[MetricsEMS10RestApiDataModel#ems_ProbabilityDistribution][ems:ProbabilityDistribution]] | exactly-one | read-write | The probability distribution of the measure. | ---+++ dcterms:title This property gives a short, human-readable title for the measure. ---+++ ems:metric This property gives a URI that identifies the metric. See [[MetricsDefinitions ][Software Metrics Definitions]] for standard URIs. ---+++ ems:unitOfMeasure This property gives a URI that identifies the unit of measure. See [[MetricsDefinitions ][Software Metrics Definitions]] for standard URIs. ---+++ ems:distribution This property gives the probability distribution of the measure, which is an inline resource of type ems:ProbabilityDistribution. The value of this property MUST be a resource that is one of the concrete probability distributions listed in [[MetricsEMS10RestApiDataModel#Probability_Distribution_Data_Mo][Probability Distribution Data Models]]. ---++ Examples ---+++ Measure Distribution 1 The following listing contains an ems:MeasureDistribution resource that describes an estimate of total project duration with a point estimate distribution of 6 months. ---++++++ Listing of Measure Distribution 1 <blockquote><verbatim><?xml version="1.0"?> <ems:MeasureDistribution xmlns:ems="http://open-services.net/ns/ems#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dcterms="http://purl.org/dc/terms/"> <dcterms:title rdf:parseType="Literal">Total Duration in Months</dcterms:title> <ems:metric rdf:resource="http://open-services.net/ns/ems/schedule#duration" /> <ems:unitOfMeasure rdf:resource="http://open-services.net/ns/ems/units#month" /> <ems:distribution> <ems:PointEstimate> <ems:numericValue rdf:datatype="http://www.w3.org/2001/XMLSchema#double">6</ems:numericValue> </ems:PointEstimate> </ems:distribution> </ems:MeasureDistribution> </verbatim></blockquote> ---+++ Measure Distribution 2 The following listing contains an ems:MeasureDistribution resource that describes an estimate of total size with a triangular distribution that peaks at 5000 ESLOC. ---++++++ Listing of Measure Distribution 2 <blockquote><verbatim><?xml version="1.0"?> <ems:MeasureDistribution xmlns:ems="http://open-services.net/ns/ems#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dcterms="http://purl.org/dc/terms/"> <dcterms:title rdf:parseType="Literal">Total Size in ESLOC</dcterms:title> <ems:metric rdf:resource="http://open-services.net/ns/ems/metric#Esloc" /> <ems:unitOfMeasure rdf:resource="http://open-services.net/ns/ems/unit#Loc" /> <ems:distribution> <ems:TriangularDistribution> <ems:low rdf:datatype="http://www.w3.org/2001/XMLSchema#double">30000</ems:low> <ems:mostLikely rdf:datatype="http://www.w3.org/2001/XMLSchema#double">50000</ems:mostLikely> <ems:high rdf:datatype="http://www.w3.org/2001/XMLSchema#double">100000</ems:high> </ems:TriangularDistribution> </ems:distribution> </ems:MeasureDistribution> </verbatim></blockquote> ---++ Comments Enter your comments here: %COMMENT%
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Topic revision: r7 - 24 Sep 2010 - 15:46:52 -
ArthurRyman
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