This set of instances contains 12 instances for the service network design for short and local food supply chain (SND-SLSC).
3 sizes of instances are considered: small (S), medium (M) and large (L).
The set of products is separated in two categories of the same size (fruits and vegetables). 
One half of the farmers produce only fruits while the other half produce only vegetables. 
Clients and hubs are randomly located on an area of 100 km by 50 km.
Spatial repartition of the farmers can be randomly generated (R) or clustered (C) with area with high density.
Moreover the spatial repartition of fruits farmers and vegetables farmers can be mixed (M) or partitioned (P), 
i.e. areas are dedicated to fruits or to vegetables. 
Instances are named with three letters stating for respectively the size, the spatial repartition of actors and the spatial repartition of fruits and vegetables farmers in the instance. 

Description of the raw data in the files:
- F = number of farmers
- C = number of clients
- H = number of hubs
- P = number of products
- T = number of periods
- Nt = number of sub-periods
- Hmax = maximal number of opened hubs
- dmax_fc = scope of action for direct delivery from farmers to clients
- dmax_h = scope of action for hubs
- S = maximum supply of farmers (one line describes one farmer and in each line is the quantity for all the products)
- D = demand of clients (each set of P lines describes the demand for one client, and in each line is the demand of one product for all the periods)
- d_hf = distance from hubs to farmers
- d_ch = distance from clients to hubs
- d_hh = distance from hubs to hubs
- d_fc = distance from farmers to clients
- s = seasonality (one line describes a product and in each line is the seasonality of the product for all the periods)

Data for SND-SLSC:
- maximum supply and demand need to be multiplied by seasonality
- C_fi (fixed shipping cost from farmer f to client c) = 2*0.8*d_fc
- C_hc (fixed cost for delivery of client c from hub h) = 4
- c_hi (unit shipping cost from hub h to client or hub i) = 0.18
- l_ct^p (unit penalty cost for non satisfaction of client c for product p in period t) = 10*D_ct^p