|Purchase of materials from third parties||2,185||-|
|Change in inventories of raw materials||177||-|
|Costs for purchases from related parties (Note 32)||470||-|
|Services rendered by third parties||1,913||9|
|Costs of rents and operating leases||120||5|
|Services rendered by related parties (Note 32)||442||56|
|Wages and salaries||1,315||43|
|Social security contributions||382||10|
|Costs related to defined-contribution plans||87||2|
|Restructuring costs - net||14||3|
|Other personnel expenses net of cost recovery||10||(11)|
|Change in finished goods, work in progress and semi-finished products||143||-|
|Internal work capitalised||(298)||-|
|Total purchases and personnel expenses||6,997||122|
Restructuring costs (€mil. 14 in 2016) mainly refer to the Electronics, Defence and Security Systems (€mil. 5), and Aeronautics (€mil. 8) divisions, as a result of the reorganisation underway.
The average workforce, as a result of the abovementioned mergers and acquisitions, amounts to no. 27,124 units; the average workforce compared with the pro-forma data at 31 December 2015 significantly decreased (no. 650 units) mainly attributable to the Electronics, Defence and Security Systems (no. 273 units), Aeronautics (no. 290 units) and Helicopters (no. 106 units) sectors.
The figure of total workforce at 31 December 2016, compared to the pro-forma data at 31 December 2015 decreased by no. 586 units as a result of the streamlining and efficiency improvement processes mainly in the Electronics, Defence and Security Systems (no. 311 units) and Helicopters (no. 178 units) sectors. The figure related to the average workforce, unlike that of the total workforce, is affected by the presence of part-time employees, personnel that took extended leave, redundant staff and employees with solidarity contracts.
The workforce breakdown is as follows:
|Average Workforce||Total Workforce|
|31 December 2016||31 December 2015||Change||31 December 2016||31 December 2015||Change|
|Senior managers (*)||706||83||623||707||78||629|
|Manual labourers (**)||6,872||-||6,872||6,924||-||6,924|
(*) Includes pilots.
(**)Includes senior manual labours.