There's a reference to synthesis in a mission of work or co-ordination plans in building work.
'A mission of synthesis or co-ordination plans with combinations of products and ideas allows the control of spatial coherence of the elements produced or formed in the workplace, from the varying branches of associations of services at the time. It's requested generally by the business firm, representative of the market. Co-ordinations plans are expanded with reference to a compilation of numerically graphic documents as a starting point, provided by the business enterprise, with respect to architectural arrangements explained in the project.
2 types of plans produced are:
- co-ordination or synthesis plans from the networks where channels or pipelines appear, cables and all types of network or circuits.
- co-ordination or synthesis plans from terminals which outlay or stack all the visible parts, layout design of suspended ceilings, lights, ventilation outlets or air vents and weak or strong current accessories."

https://jpg-au.fr/prestations-techniques-2/missions-de-synth...
"Une mission de synthèse permet de controler la cohérence spatiale des éléments d'ouvrage des différents corps d'état au moment du chantier. Elle est sollicitée généralement par l'entreprise mandataire du marché.
Les plans de synthèse sont élaborés à partir d'une compilation des documents graphiques numériques fournis par les entreprises dans le respect des dispositions architecturales du projet.
Deux types de plans sont:
- les plans de synthèse des réseaux où apparaissent canalisations, câbles et réseaux de toute nature.
- les plans de synthèse des terminaux que superposent toutes les parties visibles, calepinage des faux plafonds, des luminaires, des bouches de ventilation et des accessoires courants forts et faibles."