PRELIMINARY ASPECTS, THEORETICAL ASPECTS (POINT OF VIEW)
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BTPOINT OF VIEW
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UDC.001
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Descriptor GERASPEKT DER VORBEREITUNG, THEORETISCHER ASPEKT (GESICHTSPUNKT)
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Descriptor ENGPRELIMINARY ASPECTS, THEORETICAL ASPECTS (POINT OF VIEW)
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Descriptor FREASPECT PRÉPARATOIRE, ASPECT THÉORIQUE (POINT DE VUE)
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NTDESCRIPTION, IDENTIFICATION, ORDER AND COMPARISON
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NTDEVELOPMENTAL WORK
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NTDESIGN + OUTLINE + DRAFT + PROPOSAL (POINT OF VIEW)
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NTMODELS + MODEL ANALYSIS
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NTIMPROVEMENT, REFORM, PROBLEM SOLVING (GENERAL)
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NTCOMPARATIVE INVESTIGATIONS
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NTPREDICTION (GENERAL)