Nightwork is work at times that have substantial impact on the sleep wake cycle. The baseline is daytime work.
* This can be classical work in the night but also very early morning work (e.g. start of work at 4.am)
* If work ends after 2am this is to be considered nightwork.
It´s an interesting approach; you change from the stress point of the analysis to the strain one. This way the consideration happens at the individual level. However, it might be difficult e.g. to define who gets the shift bonus (who experience the substantial impact on the sleep wake cycle?).
Materials and Arguments considered:
Definition used within the European Union
DEFINITION: Directive 2003/88/EC of the European Parliament and of the Council – Article 2
3. “night time” means any period of not less than seven hours, as defined by national law, and which must include, in any case, the period between midnight and 5.00;
4. “night worker” means:
(a) on the one hand, any worker, who, during night time, works at least three hours of his daily working time as a normal course; and
(b) on the other hand, any worker who is likely during night time to work a certain proportion of his annual working time, as defined at the choice of the Member State concerned:
(i) by national legislation, following consultation with the two sides of industry; or
(ii) by collective agreements or agreements concluded between the two sides of industry at national or regional level;
One of the drawbacks of this definition is, that national law that defines such limit (e.g. a minimal number of night shifts to be a night worker and to get the corresponding benefits) makes it difficult to reduce night work under that threshold. Employees may resist a reduction of nightwork under this threshold.