diff --git a/poetry.lock b/poetry.lock
index 19cb150ea..69ff84b99 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -2395,8 +2395,8 @@ langchain-core = ">=0.2.10,<0.3.0"
 langchain-text-splitters = ">=0.2.0,<0.3.0"
 langsmith = ">=0.1.17,<0.2.0"
 numpy = [
-    {version = ">=1.26.0,<2.0.0", markers = "python_version >= \"3.12\""},
     {version = ">=1,<2", markers = "python_version < \"3.12\""},
+    {version = ">=1.26.0,<2.0.0", markers = "python_version >= \"3.12\""},
 ]
 pydantic = ">=1,<3"
 PyYAML = ">=5.3"
@@ -2437,8 +2437,8 @@ langchain = ">=0.2.6,<0.3.0"
 langchain-core = ">=0.2.10,<0.3.0"
 langsmith = ">=0.1.0,<0.2.0"
 numpy = [
-    {version = ">=1.26.0,<2.0.0", markers = "python_version >= \"3.12\""},
     {version = ">=1,<2", markers = "python_version < \"3.12\""},
+    {version = ">=1.26.0,<2.0.0", markers = "python_version >= \"3.12\""},
 ]
 PyYAML = ">=5.3"
 requests = ">=2,<3"
@@ -2461,8 +2461,8 @@ jsonpatch = ">=1.33,<2.0"
 langsmith = ">=0.1.75,<0.2.0"
 packaging = ">=23.2,<25"
 pydantic = [
-    {version = ">=2.7.4,<3.0.0", markers = "python_full_version >= \"3.12.4\""},
     {version = ">=1,<3", markers = "python_full_version < \"3.12.4\""},
+    {version = ">=2.7.4,<3.0.0", markers = "python_full_version >= \"3.12.4\""},
 ]
 PyYAML = ">=5.3"
 tenacity = ">=8.1.0,<8.4.0 || >8.4.0,<9.0.0"
@@ -2511,8 +2511,8 @@ files = [
 [package.dependencies]
 orjson = ">=3.9.14,<4.0.0"
 pydantic = [
-    {version = ">=2.7.4,<3.0.0", markers = "python_full_version >= \"3.12.4\""},
     {version = ">=1,<3", markers = "python_full_version < \"3.12.4\""},
+    {version = ">=2.7.4,<3.0.0", markers = "python_full_version >= \"3.12.4\""},
 ]
 requests = ">=2,<3"
 
@@ -3989,8 +3989,8 @@ files = [
 annotated-types = ">=0.4.0"
 pydantic-core = "2.20.1"
 typing-extensions = [
-    {version = ">=4.12.2", markers = "python_version >= \"3.13\""},
     {version = ">=4.6.1", markers = "python_version < \"3.13\""},
+    {version = ">=4.12.2", markers = "python_version >= \"3.13\""},
 ]
 
 [package.extras]
@@ -4279,6 +4279,24 @@ tomli = {version = ">=1", markers = "python_version < \"3.11\""}
 [package.extras]
 dev = ["argcomplete", "attrs (>=19.2)", "hypothesis (>=3.56)", "mock", "pygments (>=2.7.2)", "requests", "setuptools", "xmlschema"]
 
+[[package]]
+name = "pytest-asyncio"
+version = "0.23.7"
+description = "Pytest support for asyncio"
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "pytest_asyncio-0.23.7-py3-none-any.whl", hash = "sha256:009b48127fbe44518a547bddd25611551b0e43ccdbf1e67d12479f569832c20b"},
+    {file = "pytest_asyncio-0.23.7.tar.gz", hash = "sha256:5f5c72948f4c49e7db4f29f2521d4031f1c27f86e57b046126654083d4770268"},
+]
+
+[package.dependencies]
+pytest = ">=7.0.0,<9"
+
+[package.extras]
+docs = ["sphinx (>=5.3)", "sphinx-rtd-theme (>=1.0)"]
+testing = ["coverage (>=6.2)", "hypothesis (>=5.7.1)"]
+
 [[package]]
 name = "pytest-vcr"
 version = "1.0.2"
@@ -6090,4 +6108,4 @@ tools = ["crewai-tools"]
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.10,<=3.13"
-content-hash = "0dbf6f6e2e841fb3eec4ff87ea5d6b430f29702118fee91307983c6b2581e59e"
+content-hash = "91b755743f562d0c830916fc49df0f4fb5798cbd61d313b90165f050dfc3e34f"
diff --git a/pyproject.toml b/pyproject.toml
index eeae5cadb..69e9c4bd8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -51,6 +51,7 @@ crewai-tools = "^0.4.8"
 pytest = "^8.0.0"
 pytest-vcr = "^1.0.2"
 python-dotenv = "1.0.0"
+pytest-asyncio = "^0.23.7"
 
 [tool.poetry.scripts]
 crewai = "crewai.cli.cli:crewai"
diff --git a/src/crewai/crew.py b/src/crewai/crew.py
index 954a8f583..a7a7b1fed 100644
--- a/src/crewai/crew.py
+++ b/src/crewai/crew.py
@@ -6,15 +6,15 @@ from typing import Any, Dict, List, Optional, Tuple, Union
 
 from langchain_core.callbacks import BaseCallbackHandler
 from pydantic import (
-    UUID4,
-    BaseModel,
-    ConfigDict,
-    Field,
-    InstanceOf,
-    Json,
-    PrivateAttr,
-    field_validator,
-    model_validator,
+  UUID4,
+  BaseModel,
+  ConfigDict,
+  Field,
+  InstanceOf,
+  Json,
+  PrivateAttr,
+  field_validator,
+  model_validator,
 )
 from pydantic_core import PydanticCustomError
 
@@ -34,8 +34,8 @@ from crewai.utilities import I18N, FileHandler, Logger, RPMController
 from crewai.utilities.constants import TRAINED_AGENTS_DATA_FILE, TRAINING_DATA_FILE
 from crewai.utilities.evaluators.task_evaluator import TaskEvaluator
 from crewai.utilities.formatter import (
-    aggregate_raw_outputs_from_task_outputs,
-    aggregate_raw_outputs_from_tasks,
+  aggregate_raw_outputs_from_task_outputs,
+  aggregate_raw_outputs_from_tasks,
 )
 from crewai.utilities.training_handler import CrewTrainingHandler
 
@@ -86,7 +86,7 @@ class Crew(BaseModel):
     tasks: List[Task] = Field(default_factory=list)
     agents: List[BaseAgent] = Field(default_factory=list)
     process: Process = Field(default=Process.sequential)
-    verbose: Union[int, bool] = Field(default=0)
+    verbose: int = Field(default=0)
     memory: bool = Field(
         default=False,
         description="Whether the crew should use memory to store memories of it's execution",
@@ -131,8 +131,8 @@ class Crew(BaseModel):
         default=None,
         description="Path to the prompt json file to be used for the crew.",
     )
-    output_log_file: Optional[Union[bool, str]] = Field(
-        default=False,
+    output_log_file: Optional[str] = Field(
+        default="",
         description="output_log_file",
     )
 
diff --git a/src/crewai/procedure/__init__.py b/src/crewai/procedure/__init__.py
new file mode 100644
index 000000000..394874eb2
--- /dev/null
+++ b/src/crewai/procedure/__init__.py
@@ -0,0 +1,3 @@
+from crewai.procedure.procedure import Procedure
+
+__all__ = ["Procedure"]
diff --git a/src/crewai/procedure/procedure.py b/src/crewai/procedure/procedure.py
new file mode 100644
index 000000000..26316937b
--- /dev/null
+++ b/src/crewai/procedure/procedure.py
@@ -0,0 +1,38 @@
+import asyncio
+from typing import Any, Dict, List
+
+from pydantic import BaseModel, Field
+
+from crewai.crew import Crew
+from crewai.crews.crew_output import CrewOutput
+
+
+class Procedure(BaseModel):
+    crews: List[Crew] = Field(
+        ..., description="List of crews to be executed in sequence"
+    )
+
+    async def kickoff(self, inputs: List[Dict[str, Any]]) -> List[CrewOutput]:
+        current_inputs = inputs
+
+        for crew in self.crews:
+            # Process all inputs for the current crew
+            crew_outputs = await self._process_crew(crew, current_inputs)
+            print("Crew Outputs", crew_outputs)
+
+            # Prepare inputs for the next crew
+            current_inputs = [output.to_dict() for output in crew_outputs]
+
+        # Return the final outputs
+        return crew_outputs
+
+    async def _process_crew(
+        self, crew: Crew, inputs: List[Dict[str, Any]]
+    ) -> List[CrewOutput]:
+        # Kickoff crew asynchronously for each input
+        crew_kickoffs = [crew.kickoff_async(inputs=input_data) for input_data in inputs]
+
+        # Wait for all kickoffs to complete
+        outputs = await asyncio.gather(*crew_kickoffs)
+
+        return outputs
diff --git a/tests/procedure/test_procedure.py b/tests/procedure/test_procedure.py
new file mode 100644
index 000000000..b96a719c3
--- /dev/null
+++ b/tests/procedure/test_procedure.py
@@ -0,0 +1,201 @@
+from unittest.mock import Mock, PropertyMock
+
+import pytest
+
+from crewai.crew import Crew
+from crewai.crews.crew_output import CrewOutput
+from crewai.procedure.procedure import Procedure
+from crewai.tasks.task_output import TaskOutput
+
+
+@pytest.fixture
+def mock_crew():
+    crew = Mock(spec=Crew)
+    task_output = TaskOutput(
+        description="Test task", raw="Task output", agent="Test Agent"
+    )
+    crew_output = CrewOutput(
+        raw="Test output",
+        tasks_output=[task_output],
+        token_usage={"total_tokens": 100, "prompt_tokens": 50, "completion_tokens": 50},
+        json_dict={"key": "value"},  # Add this line
+    )
+
+    async def async_kickoff(inputs=None):
+        return crew_output
+
+    crew.kickoff.return_value = crew_output
+    crew.kickoff_async.side_effect = async_kickoff
+    return crew
+
+
+def test_procedure_initialization():
+    """
+    Test that a Procedure is correctly initialized with the given crews.
+    """
+    crew1 = Mock(spec=Crew)
+    crew2 = Mock(spec=Crew)
+
+    # Add properties required by validators
+    type(crew1).verbose = PropertyMock(return_value=True)
+    type(crew2).verbose = PropertyMock(return_value=True)
+    type(crew1).output_log_file = PropertyMock(return_value=False)
+    type(crew2).output_log_file = PropertyMock(return_value=False)
+
+    procedure = Procedure(crews=[crew1, crew2])
+    assert len(procedure.crews) == 2
+    assert procedure.crews[0] == crew1
+    assert procedure.crews[1] == crew2
+
+
+@pytest.mark.asyncio
+async def test_procedure_kickoff_single_input(mock_crew):
+    """
+    Test that Procedure.kickoff() correctly processes a single input
+    and returns the expected CrewOutput.
+    """
+    procedure = Procedure(crews=[mock_crew])
+    input_data = {"key": "value"}
+    result = await procedure.kickoff([input_data])
+
+    mock_crew.kickoff_async.assert_called_once_with(inputs=input_data)
+    assert len(result) == 1
+    assert isinstance(result[0], CrewOutput)
+    assert result[0].raw == "Test output"
+    assert len(result[0].tasks_output) == 1
+    assert result[0].tasks_output[0].raw == "Task output"
+    assert result[0].token_usage == {
+        "total_tokens": 100,
+        "prompt_tokens": 50,
+        "completion_tokens": 50,
+    }
+
+
+@pytest.mark.asyncio
+async def test_procedure_kickoff_multiple_inputs(mock_crew):
+    """
+    Test that Procedure.kickoff() correctly processes multiple inputs
+    and returns the expected CrewOutputs.
+    """
+    procedure = Procedure(crews=[mock_crew, mock_crew])
+    input_data = [{"key1": "value1"}, {"key2": "value2"}]
+    result = await procedure.kickoff(input_data)
+
+    expected_call_count = 4  # 2 crews x 2 inputs = 4
+    assert mock_crew.kickoff_async.call_count == expected_call_count
+    assert len(result) == 2
+    assert all(isinstance(r, CrewOutput) for r in result)
+    assert all(len(r.tasks_output) == 1 for r in result)
+    assert all(
+        r.token_usage
+        == {"total_tokens": 100, "prompt_tokens": 50, "completion_tokens": 50}
+        for r in result
+    )
+
+
+@pytest.mark.asyncio
+async def test_procedure_chaining():
+    """
+    Test that Procedure correctly chains multiple crews, passing the output
+    of one crew as input to the next crew in the sequence.
+
+    This test verifies:
+    1. The first crew receives the initial input.
+    2. The second crew receives the output from the first crew as its input.
+    3. The final output contains the result from the last crew in the chain.
+    4. Task outputs and token usage are correctly propagated through the chain.
+    """
+    crew1, crew2 = Mock(spec=Crew), Mock(spec=Crew)
+    task_output1 = TaskOutput(description="Task 1", raw="Output 1", agent="Agent 1")
+    task_output2 = TaskOutput(description="Task 2", raw="Final output", agent="Agent 2")
+
+    crew_output1 = CrewOutput(
+        raw="Output 1",
+        tasks_output=[task_output1],
+        token_usage={"total_tokens": 100, "prompt_tokens": 50, "completion_tokens": 50},
+        json_dict={"key1": "value1"},
+    )
+    crew_output2 = CrewOutput(
+        raw="Final output",
+        tasks_output=[task_output2],
+        token_usage={"total_tokens": 150, "prompt_tokens": 75, "completion_tokens": 75},
+        json_dict={"key2": "value2"},
+    )
+
+    async def async_kickoff1(inputs=None):
+        return crew_output1
+
+    async def async_kickoff2(inputs=None):
+        return crew_output2
+
+    crew1.kickoff_async.side_effect = async_kickoff1
+    crew2.kickoff_async.side_effect = async_kickoff2
+
+    procedure = Procedure(crews=[crew1, crew2])
+    input_data = [{"initial": "data"}]
+    result = await procedure.kickoff(input_data)
+
+    # Check that the first crew received the initial input
+    crew1.kickoff_async.assert_called_once_with(inputs={"initial": "data"})
+
+    # Check that the second crew received the output from the first crew as its input
+    crew2.kickoff_async.assert_called_once_with(inputs=crew_output1.to_dict())
+
+    # Check the final output
+    assert len(result) == 1
+    assert isinstance(result[0], CrewOutput)
+    assert result[0].raw == "Final output"
+    assert len(result[0].tasks_output) == 1
+    assert result[0].tasks_output[0].raw == "Final output"
+    assert result[0].token_usage == {
+        "total_tokens": 150,
+        "prompt_tokens": 75,
+        "completion_tokens": 75,
+    }
+    assert result[0].json_dict == {"key2": "value2"}
+
+
+@pytest.mark.asyncio
+async def test_procedure_invalid_input_type():
+    """
+    Test that Procedure.kickoff() raises a TypeError when given an invalid input type.
+    """
+    procedure = Procedure(crews=[Mock(spec=Crew)])
+    with pytest.raises(TypeError):
+        await procedure.kickoff("invalid input")
+
+
+@pytest.mark.asyncio
+async def test_procedure_token_usage_aggregation():
+    """
+    Test that Procedure correctly aggregates token usage across multiple crews.
+    """
+    crew1, crew2 = Mock(spec=Crew), Mock(spec=Crew)
+    crew1.kickoff.return_value = CrewOutput(
+        raw="Output 1",
+        tasks_output=[
+            TaskOutput(description="Task 1", raw="Output 1", agent="Agent 1")
+        ],
+        token_usage={"total_tokens": 100, "prompt_tokens": 50, "completion_tokens": 50},
+    )
+    crew2.kickoff.return_value = CrewOutput(
+        raw="Output 2",
+        tasks_output=[
+            TaskOutput(description="Task 2", raw="Output 2", agent="Agent 2")
+        ],
+        token_usage={"total_tokens": 150, "prompt_tokens": 75, "completion_tokens": 75},
+    )
+
+    procedure = Procedure([crew1, crew2])
+    result = await procedure.kickoff([{"initial": "data"}])
+
+    assert result[0].token_usage == {
+        "total_tokens": 250,
+        "prompt_tokens": 125,
+        "completion_tokens": 125,
+    }
+    assert result[0].token_usage == {
+        "total_tokens": 250,
+        "prompt_tokens": 125,
+        "completion_tokens": 125,
+    }