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Table 1. The time equation of purchasing process in construction investment.
Activity Sub-activity Time in
min.
1 Preparation requirements
in min =
2 Establishing supplier base
min =
gather information about the quality and quantity of 30
material required
+ check the availability of the material on the 15
construction site
+ verification of material 15
TOTAL in min = 60
determine the amount of local suppliers 40
+ specify the number of suppliers of the product 60
60
TOTAL in min = 160
3 Generate inquiry in min = determination of which material should ask 30
+ determine the the volume of material on request 15
+ prepare inquiry 15
+ generates a inquiry 5
+ sending inquiries 5
TOTAL in min = 70
4 Gathering and develop
offers in min =
receipt of offers 5
+ quantitative, qualitative, cost analysis 30
+ select the the most advantageous offer 5
+ approve the choice of the offer 15
+ offers additional negotiations 30
TOTAL in min = 85
5 Supplier selection in min = determine the quality of offers 30
+ evaluation of the selected provider 15
+ qualify suppliers 15
+ additional negotiating terms 30
TOTAL in min = 90
6 Preparation of contract in generate orders 20
min =
+ validation of the order 5
+ approval the order for shipment 5
TOTAL in min = 30
7 Sending orders min = sending the order 5
+ waiting for confirmation of the order 5
+ receiving confirmation from the supplier 5
TOTAL in min = 15
8 Preparation of building site check the availability of the destination 20
to receive delivery in min =
+ check the availability of the machine to unload 10
+ check readiness of employees to unloading and 10
storage
+ provide information about the date (day and hour) of 15
delivery
TOTAL in min = 55
116