diff --git a/stores/process/index.ts b/stores/process/index.ts
new file mode 100644
index 0000000..89037e0
--- /dev/null
+++ b/stores/process/index.ts
@@ -0,0 +1,9 @@
+import type { ObservableSet } from 'mobx';
+import { observable } from 'mobx';
+
+export type Process = 'LoadKP' | 'ELT';
+export type ProcessStore = ObservableSet<Process>;
+
+export default function createProcessStore() {
+  return observable.set<Process>();
+}
diff --git a/stores/root.ts b/stores/root.ts
index 4c1f6eb..a5f372e 100644
--- a/stores/root.ts
+++ b/stores/root.ts
@@ -1,6 +1,8 @@
 /* eslint-disable import/no-cycle */
 import { enableStaticRendering } from 'mobx-react-lite';
 import CalculationStore from './calculation';
+import type { ProcessStore } from './process';
+import createProcessStore from './process';
 import ResultsStore from './results';
 import TablesStore from './tables';
 
@@ -10,10 +12,12 @@ export default class RootStore {
   $calculation: CalculationStore;
   $results: ResultsStore;
   $tables: TablesStore;
+  $process: ProcessStore;
 
   constructor() {
     this.$calculation = new CalculationStore(this);
     this.$results = new ResultsStore(this);
     this.$tables = new TablesStore(this);
+    this.$process = createProcessStore();
   }
 }