diff --git a/src/compas_timber/solvers/__init__.py b/src/compas_timber/solvers/__init__.py
new file mode 100644
index 000000000..eab83c537
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+++ b/src/compas_timber/solvers/__init__.py
@@ -0,0 +1,77 @@
+"""
+********************************************************************************
+solvers
+********************************************************************************
+
+.. currentmodule:: compas_timber.solvers
+
+.. rst-class:: lead
+
+This module contains pluggable functions for the sequence generating puzzle checker extensions.
+
+Pluggables
+==========
+.. autosummary::
+    :toctree: generated/
+    :nosignatures:
+
+    next_removable_part
+    create_dissassembly_sequence
+
+"""
+from compas.plugins import pluggable
+from compas.plugins import PluginNotInstalledError
+
+
+@pluggable(category="solvers")
+def next_removable_part(assembly, removed_part_ids, part_ids_to_remove, number_of_parts_to_remove, **kwargs):
+    """Returns the next part to remove from the assembly.
+
+    One or more parts of the assembly are choosen to be removed next based on the particular solver implementation.
+
+    Parameters
+    ----------
+    assembly : `compas.datastructures.Assembly`
+        The assembly to remove parts from.
+    removed_part_ids : list
+        The list of part ids that have already been removed.
+    part_ids_to_remove : list
+        The list of part ids that are to be removed.
+    number_of_parts_to_remove : int
+        The number of parts to remove from the assembly.
+
+    Returns
+    -------
+    :class:`compas_monosashi.sequencer.Step`
+        A step which contains one or more Instructions which specify
+        the parts to remove from the assembly and the corresponding removal direction.
+
+    """
+    raise PluginNotInstalledError
+
+
+@pluggable(category="solvers")
+def create_dissassembly_sequence(assembly, **kwargs):
+    """Returns a sequence of steps to disassemble the assembly.
+
+    This function's implementation decides on the strategy used to generate the collection of
+    steps to disassemble the assembly and determines their order.
+
+    The order of steps can be revered in order to generate a sequence of steps to assemble the assembly.
+
+    Parameters
+    ----------
+    assembly : `compas.datastructures.Assembly`
+        The assembly to disassemble.
+
+    Returns
+    -------
+    :class:`compas_monosashi.sequencer.BuildingPlan`
+        A sequence of steps to disassemble the assembly.
+
+    See Also
+    --------
+    :func:`~compas_timber.solvers.next_removable_part`
+
+    """
+    raise PluginNotInstalledError