Basic feature implemented, very basic poc

app/models/check.rb

@@ -0,0 +1,5 @@
+class Check < ApplicationRecord
+  enum :level, %i[A AA AAA]
+  validates :position, :name, :success_criterion, :level, presence: true
+  validates :position, numericality: { less_than: 200 }
+end

app/models/checklist.rb

@@ -0,0 +1,6 @@
+class Checklist < ApplicationRecord
+  has_many :checklist_entries, -> { order(position: :asc) }, dependent: :destroy, inverse_of: :checklist
+  has_many :checks, through: :checklist_entries
+
+  accepts_nested_attributes_for :checklist_entries
+end

app/models/checklist_entry.rb

@@ -0,0 +1,4 @@
+class ChecklistEntry < ApplicationRecord
+  belongs_to :checklist
+  belongs_to :check
+end

app/models/element.rb

@@ -0,0 +1,6 @@
+class Element < ApplicationRecord
+  attr_accessor :checklist_id
+
+  belongs_to :report
+  has_many :success_criteria, dependent: :destroy
+end

app/models/report.rb

@@ -0,0 +1,3 @@
+class Report < ApplicationRecord
+  has_many :elements, dependent: :destroy
+end

app/models/success_criterion.rb

@@ -0,0 +1,4 @@
+class SuccessCriterion < ApplicationRecord
+  enum :result, %i[passed failed not_applicable]
+  belongs_to :element
+end