diff --git a/process/data_structure/__init__.py b/process/data_structure/__init__.py
index 97722324db..a2f6351e01 100644
--- a/process/data_structure/__init__.py
+++ b/process/data_structure/__init__.py
@@ -1,3 +1,5 @@
+"""Module containing data structure variables"""
+
 from process.data_structure import (
     blanket_variables,
     build_variables,
diff --git a/process/data_structure/blanket_variables.py b/process/data_structure/blanket_variables.py
index 3d287f924c..0eb0f89713 100644
--- a/process/data_structure/blanket_variables.py
+++ b/process/data_structure/blanket_variables.py
@@ -1,11 +1,4 @@
-"""This library contains routines that can be shared by the blanket modules used in PROCESS.
-
-These include:
-- component_volumes
-- component_masses
-- thermo_hydraulic_model
-
-
+"""Module containing variables for the blanket models
 
 Acronyms for this module:
 
@@ -21,8 +14,6 @@
      OB          Outboard
      HCD         Heating & Current Drive
      FCI         Flow Channel Insert
-
-Any changes within a subroutine or function code will have a comment explaining the change
 """
 
 from dataclasses import dataclass
@@ -38,6 +29,8 @@ class BlktModelTypes(IntEnum):
 
 @dataclass(slots=True)
 class BlanketData:
+    """Dataclass holding blanket variables"""
+
     vol_shld_inboard: float = 0.0
     """Volume of inboard shield (m3)"""
 
diff --git a/process/data_structure/build_variables.py b/process/data_structure/build_variables.py
index c5fd2f0b98..7888944d8f 100644
--- a/process/data_structure/build_variables.py
+++ b/process/data_structure/build_variables.py
@@ -1,3 +1,5 @@
+"""Module containing variables for the build models"""
+
 from dataclasses import dataclass
 from enum import IntEnum
 from types import DynamicClassAttribute
@@ -51,6 +53,8 @@ def description(self):
 
 @dataclass(slots=True)
 class BuildData:
+    """Dataclass holding build variables"""
+
     rminor_min: float = 0.25
     """Minimum allowed minor radius (m)"""
 
diff --git a/process/data_structure/buildings_variables.py b/process/data_structure/buildings_variables.py
index a58bca38c7..f1e99bdbdd 100644
--- a/process/data_structure/buildings_variables.py
+++ b/process/data_structure/buildings_variables.py
@@ -1,3 +1,5 @@
+"""Module containing variables for the buildings models"""
+
 from dataclasses import dataclass
 from enum import IntEnum
 
@@ -13,6 +15,8 @@ class BuildingsModel(IntEnum):
 
 @dataclass(slots=True)
 class BuildingsData:
+    """Dataclass holding buildings variables"""
+
     admv: float = 1.0e5
     """administration building volume (m3)"""
 
diff --git a/process/data_structure/ccfe_hcpb_variables.py b/process/data_structure/ccfe_hcpb_variables.py
index 5b0e86958d..1ece668535 100644
--- a/process/data_structure/ccfe_hcpb_variables.py
+++ b/process/data_structure/ccfe_hcpb_variables.py
@@ -1,16 +1,12 @@
-"""
-This module contains the PROCESS CCFE HCPB blanket model
-based on CCFE HCPB model from the PROCESS engineering paper
-PROCESS Engineering paper (M. Kovari et al.)
-### References
-- Kovari et al., Fusion Engineering and Design 104 (2016) 9-20
-"""
+"""Module containing variables for the CCFE HCPB models"""
 
 from dataclasses import dataclass
 
 
 @dataclass(slots=True)
 class CCFEHCPBData:
+    """Dataclass holding CCFE HCPB variables"""
+
     armour_density: float = 0.0
     """FW armour density [kg/m3]"""
 
diff --git a/process/data_structure/constraint_variables.py b/process/data_structure/constraint_variables.py
index 7e50e7bf88..6b26483816 100644
--- a/process/data_structure/constraint_variables.py
+++ b/process/data_structure/constraint_variables.py
@@ -1,8 +1,12 @@
+"""Module containing variables for the constraints"""
+
 from dataclasses import dataclass
 
 
 @dataclass(slots=True)
 class ConstraintData:
+    """Dataclass holding constraint variables"""
+
     p_hcd_injected_min_mw: float = 0.1
     """minimum auxiliary power (MW) (`constraint equation 40`)"""
 
diff --git a/process/data_structure/cost_2015_variables.py b/process/data_structure/cost_2015_variables.py
index 55ca6c12df..4a78dc2b5c 100644
--- a/process/data_structure/cost_2015_variables.py
+++ b/process/data_structure/cost_2015_variables.py
@@ -1,3 +1,5 @@
+"""Module containing variables for the costs 2015 models"""
+
 from dataclasses import dataclass, field
 
 import numpy as np
@@ -5,6 +7,8 @@
 
 @dataclass(slots=True)
 class Cost2015Data:
+    """Dataclass holding cost 2015 variables"""
+
     mean_electric_output: float = 0.0
 
     annual_electric_output: float = 0.0
diff --git a/process/data_structure/cost_variables.py b/process/data_structure/cost_variables.py
index 0b8de86c33..8b140e5c0b 100644
--- a/process/data_structure/cost_variables.py
+++ b/process/data_structure/cost_variables.py
@@ -1,3 +1,5 @@
+"""Module containing variables for the costs models"""
+
 from dataclasses import dataclass, field
 from enum import IntEnum
 
@@ -17,6 +19,8 @@ class CostModels(IntEnum):
 
 @dataclass(slots=True)
 class CostData:
+    """Dataclass holding cost variables"""
+
     c228: float = 0.0
     """c228 account cost"""
 
diff --git a/process/data_structure/cs_fatigue_variables.py b/process/data_structure/cs_fatigue_variables.py
index c95bebdbf2..ab6a90ab9f 100644
--- a/process/data_structure/cs_fatigue_variables.py
+++ b/process/data_structure/cs_fatigue_variables.py
@@ -1,8 +1,12 @@
+"""Module containing variables for the CS fatigue models"""
+
 from dataclasses import dataclass
 
 
 @dataclass(slots=True)
 class CSFatigueData:
+    """Dataclass holding CS fatigue variables"""
+
     residual_sig_hoop: float = 2.4e8
     """residual hoop stress in structural material (Pa)"""
 
diff --git a/process/data_structure/current_drive_variables.py b/process/data_structure/current_drive_variables.py
index a21824a955..49ff3975a4 100644
--- a/process/data_structure/current_drive_variables.py
+++ b/process/data_structure/current_drive_variables.py
@@ -1,12 +1,12 @@
-"""
-Module containing global variables relating to the current drive system
-"""
+"""Module containing variables for the current drive system models"""
 
 from dataclasses import dataclass
 
 
 @dataclass(slots=True)
 class CurrentDriveData:
+    """Dataclass holding current drive variables"""
+
     dx_beam_duct: float = 0.58
     """width of neutral beam duct where it passes between the TF coils (m)
     T Inoue et al, Design of neutral beam system for ITER-FEAT,
diff --git a/process/data_structure/dcll_variables.py b/process/data_structure/dcll_variables.py
index d1bdcacc8b..0402eca202 100644
--- a/process/data_structure/dcll_variables.py
+++ b/process/data_structure/dcll_variables.py
@@ -1,6 +1,4 @@
-"""This module contains the Dual Coolant Lead Lithium (DCLL) specific submods of PROCESS.
-
-
+"""Module containing variables for the Dual Coolant Lead Lithium (DCLL) models
 
 Acronyms for this module:
 
@@ -16,57 +14,6 @@
      OB          Outboard
      HCD         Heating & Current Drive
      FCI         Flow Channel Insert
-
-IN.DAT info for DCLL:
-
-     Select DCLL model
-         i_blanket_type = 5 * DCLL
-
-     Liquid Metal Breeder Material = PbLi
-         i_blkt_liquid_breeder_type = 0 * Liquid Metal Breeder Material = PbLi
-
-     Specify dual-coolant i.e., get mass flow required from heat extracted from liquid metal breeder
-         i_blkt_dual_coolant = 2
-
-     FIC switch: 0 = no FIC, Eurofer; 1 = FCIs, perfect electrical insulator, 2 = FCIs, with specified conductance
-         i_blkt_liquid_breeder_channel_type = 0, 1, or 2
-
-     Liquid metal duct wall conductance initialized at Eurofer value in fwbs_variables, or can input other value, used for i_blkt_liquid_breeder_channel_type = 0 or 2
-         (bz_channel_conduct_liq)
-
-     Choose if FW and BB structure are on the same pumping system (unless have different coolants), default is same coolant with flow IN->FW->BB->OUT
-         (i_fw_blkt_shared_coolant)
-
-     Can set inlet and outlet temperature for liquid metal breeder
-         (inlet_temp_liq)
-         (outlet_temp_liq)
-
-References
-----------
-     [Nat1995]   Natesan et al. (1995), Assessment of alkali metal coolants for
-                 for the ITER blanket, Fusion Engineering and Design 27, 457-466
-
-     [Mal1995]   Malang and Mattas (1995), Comparison of lithium and the eutectic
-                 lead-lithium alloy, two candidate liquid metal breeder materials
-                 for self-cooled blankets, Fusion Engineering and Design 27, 399-406
-
-     [Gas2001]   Gasior and Mozer (2001), Thermodynamic study of liquid lithium-lead
-                 alloys using the EMF method, Journal of Nuclear Materials, 294, 77-83
-
-     [Pal2016]   Palermo et al. (2016), Neutronic analyses of the preliminary design
-                 of a DCLL blanket for the EUROfusion DEMO power plant,
-                 Fusion Engineering and Design 109-111.
-
-     [Gar2017]   Garcinuno et al. (2017), Design of a permeator against vacuum for
-                 tritium extraction from eutectic lithium-lead in a DCLL DEMO,
-                 Fusion Engineering and Design, 117, 226-231
-
-     [Fer2021]   Fernandez-Berceruelo et al. (2021), Alternatives for upgrading the
-                 eu dcll breeding blanket from mms to sms, Fusion Engineering and
-                 Design 167, 112380
-
-
-Note: request for when CCFE Bluemira neutronics work is added: output maximum values, as well as average values, for wall neutronics calculation if possible.
 """
 
 from dataclasses import dataclass
@@ -74,6 +21,8 @@
 
 @dataclass(slots=True)
 class DCLLData:
+    """Dataclass holding DCLL variables"""
+
     r_fci: float = 0.0
     """Radial thickness of FCIs [m]"""
 
diff --git a/process/data_structure/divertor_variables.py b/process/data_structure/divertor_variables.py
index a986a67243..29934185b4 100644
--- a/process/data_structure/divertor_variables.py
+++ b/process/data_structure/divertor_variables.py
@@ -1,3 +1,5 @@
+"""Module containing variables for the divertor models"""
+
 from dataclasses import dataclass
 from enum import IntEnum
 
@@ -17,7 +19,7 @@ class DivertorHeatLoadModel(IntEnum):
 
 @dataclass(slots=True)
 class DivertorData:
-    """Divertor model dataclass"""
+    """Dataclass holding divertor variables"""
 
     anginc: float = 0.262
     """angle of incidence of field line on plate (rad)"""
diff --git a/process/data_structure/first_wall_variables.py b/process/data_structure/first_wall_variables.py
index 7df351ffba..2816eba93a 100644
--- a/process/data_structure/first_wall_variables.py
+++ b/process/data_structure/first_wall_variables.py
@@ -1,8 +1,12 @@
+"""Module containing variables for the first wall models"""
+
 from dataclasses import dataclass
 
 
 @dataclass(slots=True)
 class FirstWallData:
+    """Dataclass holding first wall variables"""
+
     a_fw_total_full_coverage: float = 0.0
     """First wall total surface area with no holes or ports [m^2]"""
 
diff --git a/process/data_structure/fwbs_variables.py b/process/data_structure/fwbs_variables.py
index eed0c7be87..acd52894d6 100644
--- a/process/data_structure/fwbs_variables.py
+++ b/process/data_structure/fwbs_variables.py
@@ -1,15 +1,12 @@
-"""
-Module containing global variables relating to the first wall, blanket and
-shield components
-### References
--
-"""
+"""Module containing variables for the first wall, blanket and shield components"""
 
 from dataclasses import dataclass, field
 
 
 @dataclass(slots=True)
 class FWBSData:
+    """Dataclass holding first wall, blanket and shield variables"""
+
     life_blkt_fpy: float = 0.0
     """Full power blanket lifetime (years)"""
 
diff --git a/process/data_structure/global_variables.py b/process/data_structure/global_variables.py
index f3e9849c3e..f00c9441ab 100644
--- a/process/data_structure/global_variables.py
+++ b/process/data_structure/global_variables.py
@@ -1,8 +1,12 @@
+"""Module containing variables necessary for running PROCESS"""
+
 from dataclasses import dataclass
 
 
 @dataclass(slots=True)
 class GlobalData:
+    """Dataclass holding global variables"""
+
     icase: str = "Steady-state tokamak model"
     """Power plant type"""
 
diff --git a/process/data_structure/heat_transport_variables.py b/process/data_structure/heat_transport_variables.py
index 855626fcf8..41c634e50a 100644
--- a/process/data_structure/heat_transport_variables.py
+++ b/process/data_structure/heat_transport_variables.py
@@ -1,8 +1,5 @@
-"""
-This module contains global variables relating to the heat transport system
+"""Module containing variables for the heat transport system
 of a fusion power plant, and also those for a hydrogen production plant.
-### References
--
 """
 
 from dataclasses import dataclass
@@ -10,6 +7,8 @@
 
 @dataclass(slots=True)
 class HeatTransportData:
+    """Dataclass holding heat transport variables"""
+
     p_plant_electric_base: float = 5.0e6
     """base plant electric load (W)"""
 
diff --git a/process/data_structure/ife_variables.py b/process/data_structure/ife_variables.py
index 1731867a17..17f1ea8941 100644
--- a/process/data_structure/ife_variables.py
+++ b/process/data_structure/ife_variables.py
@@ -1,4 +1,4 @@
-"""Module containing global variables relating to the inertial fusion energy model
+"""Module containing global variables for the Inertial Fusion Energy (IFE) models
 
 
 
@@ -31,6 +31,8 @@
 
 @dataclass(slots=True)
 class IFEData:
+    """Dataclass holding IFE variables"""
+
     bldr: float = 1.0
     """radial thickness of IFE blanket (m; calculated `if ifetyp=4`)"""
 
diff --git a/process/data_structure/impurity_radiation_variables.py b/process/data_structure/impurity_radiation_variables.py
index ec050687fc..ccbe7d6556 100644
--- a/process/data_structure/impurity_radiation_variables.py
+++ b/process/data_structure/impurity_radiation_variables.py
@@ -1,3 +1,5 @@
+"""Module containing variables for the impurity radiation models"""
+
 from dataclasses import dataclass, field
 
 import numpy as np
@@ -24,6 +26,8 @@
 
 @dataclass(slots=True)
 class ImpurityRadiationData:
+    """Dataclass holding impurity radiation variables"""
+
     radius_plasma_core_norm: float = 0.6
     """Normalised radius defining the 'core' region"""
 
diff --git a/process/data_structure/neoclassics_variables.py b/process/data_structure/neoclassics_variables.py
index e623f114f2..9304f493eb 100644
--- a/process/data_structure/neoclassics_variables.py
+++ b/process/data_structure/neoclassics_variables.py
@@ -1,4 +1,4 @@
-"""Module containing neoclassical computations
+"""Module containing variables for the neoclassical models
 
 Formulas used are described in:
 Beidler (2013), https://doi.org/10.1088/0029-5515/51/7/076001
@@ -14,6 +14,8 @@
 
 @dataclass(slots=True)
 class NeoclassicsData:
+    """Dataclass holding neoclassics variables"""
+
     densities: list[float] = field(default_factory=lambda: np.zeros(4))
     """Densities of the species that are considered [/m3]"""
 
diff --git a/process/data_structure/numerics.py b/process/data_structure/numerics.py
index 2bdec08e41..7c449a6294 100644
--- a/process/data_structure/numerics.py
+++ b/process/data_structure/numerics.py
@@ -1,3 +1,5 @@
+"""Module containing variables for the numerics"""
+
 from dataclasses import dataclass, field
 from enum import IntEnum
 from types import DynamicClassAttribute
@@ -112,6 +114,8 @@ def description(self):
 
 @dataclass(slots=True)
 class NumericsData:
+    """Dataclass holding numerics variables"""
+
     ioptimz: int = 1
     """Code operation switch:
     * -2 for evaluation mode (i.e. no optimisation)
diff --git a/process/data_structure/pf_power_variables.py b/process/data_structure/pf_power_variables.py
index 4ed641a8eb..45ff6bdcd2 100644
--- a/process/data_structure/pf_power_variables.py
+++ b/process/data_structure/pf_power_variables.py
@@ -1,6 +1,4 @@
-"""
-Module containing global variables relating to the PF coil power conversion system
-"""
+"""Module containing variables for the PF coil power models"""
 
 from dataclasses import dataclass, field
 
@@ -9,6 +7,8 @@
 
 @dataclass(slots=True)
 class PFPowerData:
+    """Dataclass holding PF power variables"""
+
     acptmax: float = 0.0
     """average of currents in PF circuits (kA)"""
 
diff --git a/process/data_structure/pfcoil_variables.py b/process/data_structure/pfcoil_variables.py
index f90096e873..2942b13c69 100644
--- a/process/data_structure/pfcoil_variables.py
+++ b/process/data_structure/pfcoil_variables.py
@@ -1,3 +1,5 @@
+"""Module containing variables for the PF coil models"""
+
 from dataclasses import dataclass, field
 from enum import IntEnum
 
@@ -37,7 +39,8 @@ class PFConductorModel(IntEnum):
 
 @dataclass(slots=True)
 class PFCoilData:
-    # PF coil module variables
+    """Dataclass holding PF coil variables"""
+
     nef: int = 0
 
     nfxf: int = 0
diff --git a/process/data_structure/physics_variables.py b/process/data_structure/physics_variables.py
index 28e37dee79..21e371585f 100644
--- a/process/data_structure/physics_variables.py
+++ b/process/data_structure/physics_variables.py
@@ -1,11 +1,4 @@
-"""Module containing tokamak plasma physics routines
-
-This module contains all the primary plasma physics routines
-for a tokamak device.
-
-
-Module containing global variables relating to the plasma physics
-"""
+"""Module containing variables for the plasma models"""
 
 from dataclasses import dataclass, field
 from enum import IntEnum
@@ -378,6 +371,8 @@ def __new__(cls, value: int, description: str):
 
 @dataclass(slots=True)
 class PhysicsData:
+    """Dataclass holding physics variables"""
+
     iscz: int = 0
 
     err242: int = 0
diff --git a/process/data_structure/power_variables.py b/process/data_structure/power_variables.py
index 9cb71b8fd0..722043d4bc 100644
--- a/process/data_structure/power_variables.py
+++ b/process/data_structure/power_variables.py
@@ -1,8 +1,12 @@
+"""Module containing variables for the power models"""
+
 from dataclasses import dataclass, field
 
 
 @dataclass(slots=True)
 class PowerData:
+    """Dataclass holding power variables"""
+
     qmisc: float = 0.0
 
     qac: float = 0.0
diff --git a/process/data_structure/primary_pumping_variables.py b/process/data_structure/primary_pumping_variables.py
index 38f6a13ecf..e71756a304 100644
--- a/process/data_structure/primary_pumping_variables.py
+++ b/process/data_structure/primary_pumping_variables.py
@@ -1,8 +1,12 @@
+"""Module containing variables for the primary pumping models"""
+
 from dataclasses import dataclass
 
 
 @dataclass(slots=True)
 class PrimaryPumpingData:
+    """Dataclass holding primary pumping variables"""
+
     gamma_he: float = 1.667
     """ratio of specific heats for helium (`i_p_coolant_pumping=3`)"""
 
diff --git a/process/data_structure/pulse_variables.py b/process/data_structure/pulse_variables.py
index b5b760b158..142317b664 100644
--- a/process/data_structure/pulse_variables.py
+++ b/process/data_structure/pulse_variables.py
@@ -1,8 +1,12 @@
+"""Module containing variables for the pulse models"""
+
 from dataclasses import dataclass
 
 
 @dataclass(slots=True)
 class PulseData:
+    """Dataclass holding pulse variables"""
+
     bctmp: float = 320.0
     """first wall bulk coolant temperature (C)"""
 
diff --git a/process/data_structure/rebco_variables.py b/process/data_structure/rebco_variables.py
index 019dd86818..8dc1ea6d27 100644
--- a/process/data_structure/rebco_variables.py
+++ b/process/data_structure/rebco_variables.py
@@ -1,8 +1,12 @@
+"""Module containing variables for the REBCO models"""
+
 from dataclasses import dataclass
 
 
 @dataclass(slots=True)
 class RebcoData:
+    """Dataclass holding REBCO variables"""
+
     dx_hts_tape_rebco: float = 1.0e-6
     """thickness of REBCO layer in tape (m) (`iteration variable 138`)"""
 
diff --git a/process/data_structure/reinke_variables.py b/process/data_structure/reinke_variables.py
index 445ee85d43..81556141d7 100644
--- a/process/data_structure/reinke_variables.py
+++ b/process/data_structure/reinke_variables.py
@@ -1,8 +1,12 @@
+"""Module containing variables for the Reinke models"""
+
 from dataclasses import dataclass
 
 
 @dataclass(slots=True)
 class ReinkeData:
+    """Dataclass holding Reinke variables"""
+
     impvardiv: int = 9
     """Index of impurity to be iterated for Reinke divertor detachment criterion"""
 
diff --git a/process/data_structure/scan_variables.py b/process/data_structure/scan_variables.py
index 04aeb2dc9f..44938b28c3 100644
--- a/process/data_structure/scan_variables.py
+++ b/process/data_structure/scan_variables.py
@@ -1,9 +1,4 @@
-"""Module containing routines to perform a parameter scan
-
-None
-This module contains routines to perform a parameter scan
-over a range of values of a particular scanning variable.
-"""
+"""Module containing variables required to perform a parameter scan"""
 
 from dataclasses import dataclass, field
 
@@ -22,6 +17,8 @@
 
 @dataclass(slots=True)
 class ScanData:
+    """Dataclass holding scan variables"""
+
     scan_dim: int = 1
     """1-D or 2-D scan switch (1=1D, 2=2D)"""
 
diff --git a/process/data_structure/stellarator_configuration.py b/process/data_structure/stellarator_configuration.py
index 313801a543..1cd71d0708 100644
--- a/process/data_structure/stellarator_configuration.py
+++ b/process/data_structure/stellarator_configuration.py
@@ -1,8 +1,12 @@
+"""Module containing variables for the stellarator configuration"""
+
 from dataclasses import dataclass
 
 
 @dataclass(slots=True)
 class StellaratorConfigData:
+    """Dataclass holding stellarator config variables"""
+
     stella_config_name: str = ""
     """Name of the configuration"""
 
diff --git a/process/data_structure/stellarator_variables.py b/process/data_structure/stellarator_variables.py
index 6e05c4ea60..8d2bd3ca23 100644
--- a/process/data_structure/stellarator_variables.py
+++ b/process/data_structure/stellarator_variables.py
@@ -1,8 +1,12 @@
+"""Module containing variables for the stellarator models"""
+
 from dataclasses import dataclass
 
 
 @dataclass(slots=True)
 class StellaratorData:
+    """Dataclass holding stellarator variables"""
+
     f_st_n_coils: float = 0.0
     """Actual number of coils to reference value from stella_config file"""
 
diff --git a/process/data_structure/structure_variables.py b/process/data_structure/structure_variables.py
index 082461bb18..3ebcc647ab 100644
--- a/process/data_structure/structure_variables.py
+++ b/process/data_structure/structure_variables.py
@@ -1,9 +1,11 @@
+"""Module containing variables for the structure models"""
+
 from dataclasses import dataclass
 
 
 @dataclass(slots=True)
 class StructureData:
-    """Data describing the structure."""
+    """Dataclass holding structure variables"""
 
     aintmass: float = 0.0
     """intercoil structure mass (kg)"""
diff --git a/process/data_structure/superconducting_tf_coil_variables.py b/process/data_structure/superconducting_tf_coil_variables.py
index 285555102f..8d39c2858a 100644
--- a/process/data_structure/superconducting_tf_coil_variables.py
+++ b/process/data_structure/superconducting_tf_coil_variables.py
@@ -1,13 +1,4 @@
-"""Module containing superconducting TF coil routines
-
-
-
-N/A
-This module contains routines for calculating the
-parameters of a superconducting TF coil system for a
-fusion power plant.
-PROCESS Superconducting TF Coil Model, J. Morris, CCFE, 1st May 2014
-"""
+"""Module containing variables for the superconducting TF coil models"""
 
 from dataclasses import dataclass
 from enum import IntEnum
@@ -27,6 +18,8 @@ class TFWPIntegerTurnType(IntEnum):
 
 @dataclass(slots=True)
 class SuperconductingTFData:
+    """Dataclass holding superconducting TF variables"""
+
     tf_fit_t: float = 0.0
     """Dimensionless winding pack width"""
 
diff --git a/process/data_structure/tfcoil_variables.py b/process/data_structure/tfcoil_variables.py
index e15d317a3b..8f55386411 100644
--- a/process/data_structure/tfcoil_variables.py
+++ b/process/data_structure/tfcoil_variables.py
@@ -1,6 +1,4 @@
-"""
-Module containing global variables relating to the toroidal field coil systems
-"""
+"""Module containing variables for the TF coil models"""
 
 from dataclasses import dataclass, field
 
@@ -14,6 +12,8 @@
 
 @dataclass(slots=True)
 class TFData:
+    """Dataclass holding TF coil variables"""
+
     a_tf_coil_inboard_case: float = 0.0
     """external case area per coil (inboard leg) (m2)"""
 
diff --git a/process/data_structure/times_variables.py b/process/data_structure/times_variables.py
index 7cd54a1067..23e813b7c7 100644
--- a/process/data_structure/times_variables.py
+++ b/process/data_structure/times_variables.py
@@ -1,3 +1,5 @@
+"""Module containing variables for the times models"""
+
 from dataclasses import dataclass, field
 
 import numpy as np
@@ -5,6 +7,8 @@
 
 @dataclass(slots=True)
 class TimesData:
+    """Dataclass holding times variables"""
+
     pulsetimings: int = 1
     """Switch for pulse timings (if i_pulsed_plant=1):
 
diff --git a/process/data_structure/vacuum_variables.py b/process/data_structure/vacuum_variables.py
index b0cd721ee7..5c5829b852 100644
--- a/process/data_structure/vacuum_variables.py
+++ b/process/data_structure/vacuum_variables.py
@@ -1,3 +1,5 @@
+"""Module containing variables for the vacuum vessel models"""
+
 from dataclasses import dataclass
 from enum import IntEnum
 
@@ -11,6 +13,8 @@ class VacuumPumpType(IntEnum):
 
 @dataclass(slots=True)
 class VacuumData:
+    """Dataclass holding vacuum vessel variables"""
+
     i_vacuum_pumping: str = "old"
     """switch for vacuum pumping model:
 
diff --git a/process/data_structure/water_usage_variables.py b/process/data_structure/water_usage_variables.py
index 7f5361ad21..96b6bcfb7c 100644
--- a/process/data_structure/water_usage_variables.py
+++ b/process/data_structure/water_usage_variables.py
@@ -1,4 +1,4 @@
-"""Module containing global variables relating to the water usage
+"""Module containing variables for the water usage models
 
 References
 ----------
@@ -11,6 +11,8 @@
 
 @dataclass(slots=True)
 class WaterUseData:
+    """Dataclass holding water use variables"""
+
     airtemp: float = 15.0
     """ambient air temperature (degrees Celsius)"""
     watertemp: float = 5.0