Application of Artificial Neural Network(s) in Predicting Formwork Labour Productivity

Table 1

Labour productivity factors.

Weather	Crew	Project
Temperature (T)	Gang size (GS)	Work type (WT)
Humidity (H)	Labour percentage (LP)	Floor level (FL)
Wind speed (WS)		Work method (WM)
Precipitation (P)

Temperature: based on an average of eight working hours a day (°C). Humidity: average humidity of eight working hours a day in percentage form. Precipitation: includes four numerical value terms assigned as: no precipitation = 0, light rain = 1, snow = 2, and rain = 3. Wind speed: average wind speed for eight working hours a day and included in the calculation in terms of km/h. Height: related to the floor being worked on and included in terms of the number of floors. Work type: three different types of formwork installation included as slabs = 1, walls = 2, and columns = 3. Work method: covers two techniques built in place (BIP) and flying forms (FF). BIP was coded as 1 and FF was coded as 2. Gang size: number of persons in a crew. Labour percentage: the ratio of labour to gang size obtained from the following equation: (labour% = labour size/gang size) × 100.