fix: fix typing bugs

dataclasses are not the same as dictionaries.

Author: Nate1729

process_improvement/calculations/capability_calculations.py

@@ -13,7 +13,7 @@ def calculate_capability_indices(
         LSL: int,
         Target: int,
         round_value: int = 2,
-        ) -> dict[str, float]:
+        ) -> ProcessCapabilityIndices:
         """
         Calculate process capability and performance indices.
 
@@ -142,4 +142,4 @@ def calculate_capability_indices(
             mean=mean,
             s=s, # The standard deviation
             average_mR=ave_mR,
-        )
+        )

process_improvement/calculations/loss_function_calculations.py

@@ -12,7 +12,7 @@ def taguchi_loss_calcs(
         USL: float,
         LSL: float,
         Target: Optional[float] = None
-        ) -> dict[str, float or list]:
+        ) -> TaguchiLossCalcResults:
     """
     Compute quadratic loss function (Taguchi loss function) values over a
     specification range.
@@ -117,9 +117,9 @@ def expected_loss_calc(
         USL: float,
         LSL: float,
         Target: Optional[float] = None,
-        cost_of_scrap: Optional[float] = 1,
+        cost_of_scrap: float = 1,
         # round_value: Optional[float] = 1
-        ) -> dict[str, float or list]:
+        ) -> ExpectedLossCalcResults:
     """
     Docstring for expected_loss
 
@@ -157,4 +157,4 @@ def expected_loss_calc(
 
     return ExpectedLossCalcResults(
         df=stats_df
-    )
+    )

process_improvement/calculations/xmr_calculations.py

@@ -43,7 +43,7 @@ def calculate_xmr_limits(
             restrict_LPL: bool,
             max_value: float = 100.0,
             min_value: float = 0.0
-            ) -> dict[str, float]:
+            ) -> XmRLimits:
             """
             Calculate Individuals and Moving Range (XmR) process limits.
 
@@ -227,4 +227,4 @@ def characterize_mr_variation(
             ),
             index=mr.index,
             name="mR chart variation"
-        )
+        )