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Sixty years of project planning: history and future

M. Hajdu

M. Hajdu

Budapest University of Technology and EconomicsBudapest, Hungary
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Hajdu, M.
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S. Isaac

S. Isaac

Ben-Gurion University of the NegevBe’er Sheva, Israel
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Isaac, S.
  
14 mar 2017
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Categoría del artículo: Research Article
Publicado en línea: 14 mar 2017
Páginas: 1499 - 1510
Recibido: 16 oct 2016
Aceptado: 28 nov 2016
DOI: https://doi.org/10.1515/otmcj-2016-0013
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© 2016 M. Hajdu et al., published by De Gruyter Open
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Fig. 1

Mercury delay line memory of UNIVAC I (https://en.wikipedia.org/wiki/UNIVAC_I).
Mercury delay line memory of UNIVAC I (https://en.wikipedia.org/wiki/UNIVAC_I).

Fig. 2

Result of the first CPM analysis made by a computer (Kelley 1989).
Result of the first CPM analysis made by a computer (Kelley 1989).

Fig. 3

Topology graph of the CPM network (Kelley 1989).
Topology graph of the CPM network (Kelley 1989).

Fig. 4

Typical density function of the PERT-beta distribution.
Typical density function of the PERT-beta distribution.

Fig. 5

Distribution of the project duration of one-chain and 10-chain networks.
Distribution of the project duration of one-chain and 10-chain networks.

Fig. 6

The effect of the different activity calendars on the distribution of project duration based on the same one-chain network (Hajdu 2013).
The effect of the different activity calendars on the distribution of project duration based on the same one-chain network (Hajdu 2013).

Fig. 7

Assumption of time vs cost of the original CPM model.
Assumption of time vs cost of the original CPM model.

Fig. 8

The set of feasible solutions of the CPM model.
The set of feasible solutions of the CPM model.

Fig. 9

Maximal relations in PDM network.
Maximal relations in PDM network.

Fig. 10

Assumption of linear activities is essential in case of traditional relationships.
Assumption of linear activities is essential in case of traditional relationships.

Fig. 11

The positive effect of pre-emption on the project duration.
The positive effect of pre-emption on the project duration.

Fig. 12

Application of logical switches on relationships.
Application of logical switches on relationships.

Fig. 13

Point-to-point relations for better modelling of overlapping activities.
Point-to-point relations for better modelling of overlapping activities.

Fig. 14

Continuous relations with time and work gaps.
Continuous relations with time and work gaps.

Fig. 15

Bi-directional precedence relations.
Bi-directional precedence relations.

Fig. 16

Possible optimal solutions of Fig. 15.
Possible optimal solutions of Fig. 15.
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