. PLANNING OF PHOTOCRAMMETRIC PROJECTS. 
e 
15; Introduction 
  
4.1.Historical Review: 
At the XI Congress of ISP at Lausanne, Comm. IV adopted a proposal by the author as 
resolution No. 5, reading: 
"The parametersinfluencing the accuracy and cost of different photogrammetric 
subsystems should be studied, in order to establish the basic relations 
required for planning and designing of photogrammetric projects". 
In the invited paper: "System Analysis applied to the planning of photogrammetric 
projects", presented to the Symposium of Comm. IV at Delft in September 1970, the 
author proposed a new definition, reading: 
"A general and thorough system analysis of the problem of planning photogrammetric 
projects should be carried out. On the basis of such an analysis, the following 
objectives should be achieved: 
a) Development of a systematic and scientific method for the planning of 
photogrammetric projects; and 
b) Establishment and compilation of the information and data required for 
such a systematic planning procedure in the form of objective cost-models, 
accuracy models and qualitative information models of all alternative 
process components available in photogrammetric technology". 
"In the above-mentioned invited paper an attempt was made to present a system 
analysis of the overall problem, dealing not only with the design of optimal 
procedures to achieve given product specifications, but also with the problem of 
establishing optimal product specifications, since it can be shown that both 
problems are closely interrelated and certainly of equal importance. 
The discussion following the presentation of the invited paper allows the following 
conclusions: 
In general there was agreement concerning the necessity to develop a more systematic 
and objective approach to planning in our profession. 
Although some speskers were afraid that the author's approach to the problem was 
too abstract, it was concluded that this approach might yet lead to a more orderly 
thinking into the cost processes involved in photogrammetric work. 
° The main part of the discussion centered of course around.the difficulties to 
establish the required cost and performance models and to achieve a suitable 
quantification of all influencing factors and parameters involved. 
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