diff --git a/parallelisation/02-1_ngt_points.py b/parallelisation/02-1_ngt_points.py
new file mode 100644
index 0000000..ac8b35a
--- /dev/null
+++ b/parallelisation/02-1_ngt_points.py
@@ -0,0 +1,410 @@
+# %%
+from __future__ import annotations
+
+import sys
+from collections.abc import Collection, Iterable
+from dataclasses import InitVar, dataclass, field, fields, is_dataclass
+from pathlib import Path
+from typing import Any, Generic, Literal, Never, TypeVar
+
+import pyvips
+
+T = TypeVar("T")
+
+# %%
+BASE_PATH = Path(
+    r"B:\projects\KSG\Ordnerstruktur\Verifizierdaten_1\20260225\614706_helles Entek\614706_helles Entek[3136761]_1"
+)
+assert BASE_PATH.exists()
+
+TMP_DATA_PATH = Path(
+    r"B:\projects\KSG\Ordnerstruktur\Daten"
+)  # needed to find generated RGB images
+assert TMP_DATA_PATH.exists()
+assert TMP_DATA_PATH.is_dir()
+# %%
+ngt_folder = Path(
+    r"B:\projects\KSG\Ordnerstruktur\Verifizierdaten_1\20260225\614706_helles Entek\614706_helles Entek[3136761]_1\614706_helles Entek[3136761]_1_A_1\ngpointdata"
+)
+assert ngt_folder.exists()
+
+
+# %%
+@dataclass(slots=True)
+class NgtLine:
+    e1: int
+    e2: int
+    e3: int
+    e4: int
+    e5: int
+    e6: int
+    e7: int
+    e8: int
+    e9: int
+    e10: int
+    e11: int
+
+
+@dataclass(slots=True)
+class NgtDoc:
+    _lines: InitVar[Iterable[NgtLine]]
+    file: Path
+    rgb_img: Path
+    lines: tuple[NgtLine, ...] = field(init=False)
+
+    def __post_init__(
+        self,
+        _lines: Iterable[NgtLine],
+    ) -> None:
+        self.lines = tuple(_lines)
+
+    @property
+    def len(self) -> int:
+        return len(self.lines)
+
+
+@dataclass(slots=True)
+class NgtDocs:
+    _docs: InitVar[Iterable[NgtDoc]]
+    docs: tuple[NgtDoc, ...] = field(init=False)
+    total_lines: int = field(init=False)
+
+    def __post_init__(
+        self,
+        _lines: Iterable[NgtDoc],
+    ) -> None:
+        self.docs = tuple(_lines)
+        self.total_lines = sum(doc.len for doc in self.docs)
+
+    @property
+    def len(self) -> int:
+        return len(self.docs)
+
+
+def get_ngt_doc(
+    ngt_file: Path,
+) -> NgtDoc:
+    ngt_lines: list[NgtLine] = []
+    with open(ngt_file, "r", encoding="utf-8") as f:
+        for line_no, line in enumerate(f):
+            if line_no in (0, 1):
+                continue
+            contents = (int(e) for e in line.strip("\n ").split(","))
+            ngt_line = NgtLine(*contents)
+            ngt_lines.append(ngt_line)
+
+    rgb_img_folder = TMP_DATA_PATH.joinpath(*ngt_file.parts[-4:-2], "checkimg")
+    assert rgb_img_folder.exists()
+    rgb_img_path = tuple(rgb_img_folder.glob(f"*{ngt_file.stem}*"))[0]
+    assert rgb_img_path.exists()
+
+    return NgtDoc(ngt_lines, ngt_file, rgb_img_path)
+
+
+def get_all_ngt_docs(
+    package_path: Path,
+) -> NgtDocs:
+    parsed_docs: list[NgtDoc] = []
+    for ngt_file_path in package_path.rglob("ngpointdata/*.ngt"):
+        ngt_doc = get_ngt_doc(ngt_file_path)
+
+        parsed_docs.append(ngt_doc)
+
+    return NgtDocs(parsed_docs)
+
+
+class Chunk(Generic[T]):
+    def __init__(
+        self,
+        capacity: int,
+        overfill_once: bool = True,
+        cap_property: str | None = None,
+    ) -> None:
+        self.capacity = capacity
+        self.overfill = overfill_once
+        self.capacity_left: int = capacity
+        self.capacity_held: int = 0
+        self.full: bool = False
+        self._contents: list[T] = []
+        self.cap_property = cap_property
+
+    def __repr__(self) -> str:
+        return self._contents.__repr__()
+
+    def __str__(self) -> str:
+        return self._contents.__str__()
+
+    @property
+    def contents(self) -> list[T]:
+        return self._contents
+
+    def __len__(self) -> int:
+        return len(self._contents)
+
+    def __getitem__(
+        self,
+        idx: int,
+    ) -> T:
+        return self._contents[idx]
+
+    def __raise_for_exceeded_capacity(self) -> Never:
+        raise ValueError("Item can not be added due to capacity limit.")
+
+    def _capacity_sufficient(
+        self,
+        size_to_add: int,
+    ) -> bool:
+        if self.full:
+            return False
+
+        new_size = len(self) + size_to_add
+
+        if self.overfill and (new_size > self.capacity):
+            return True
+        elif new_size > self.capacity:
+            return False
+        else:
+            return True
+
+    def _recalc_capacity(
+        self,
+        size_to_add: int,
+    ) -> None:
+        self.capacity_held += size_to_add
+        self.capacity_left = max(self.capacity_left - size_to_add, 0)
+        if self.capacity_left == 0:
+            self.full = True
+        else:
+            self.full = False
+
+    def append(
+        self,
+        object_: T,
+    ) -> None:
+        size_to_add: int = 1
+        if self.cap_property is not None:
+            if not hasattr(object_, self.cap_property):
+                raise AttributeError("Object does not posses the wanted property")
+            attr = getattr(object_, self.cap_property)
+            if not isinstance(attr, int):
+                raise TypeError("Capacity property must be an integer")
+            size_to_add = attr
+
+        if self._capacity_sufficient(size_to_add):
+            self._contents.append(object_)
+            self._recalc_capacity(size_to_add)
+        else:
+            self.__raise_for_exceeded_capacity()
+
+    def extend(
+        self,
+        collection: Collection[T],
+    ) -> None:
+        size_to_add: int = len(collection)
+        if self.cap_property is not None:
+            if not all(hasattr(object_, self.cap_property) for object_ in collection):
+                raise AttributeError("Object does not posses the wanted property")
+            if not all(
+                isinstance(getattr(object_, self.cap_property), int) for object_ in collection
+            ):
+                raise TypeError("Capacity property must be an integer")
+            size_to_add = sum(getattr(object_, self.cap_property) for object_ in collection)
+
+        if self._capacity_sufficient(size_to_add):
+            self._contents.extend(collection)
+            self._recalc_capacity(size_to_add)
+        else:
+            self.__raise_for_exceeded_capacity()
+
+    def remove(
+        self,
+        object_: T,
+    ) -> None:
+        size_to_add: int = 1
+        if self.cap_property is not None:
+            if not hasattr(object_, self.cap_property):
+                raise AttributeError("Object does not posses the wanted property")
+            attr = getattr(object_, self.cap_property)
+            if not isinstance(attr, int):
+                raise TypeError("Capacity property must be an integer")
+            size_to_add = attr
+        size_to_remove = (-1) * size_to_add
+
+        self._contents.remove(object_)
+        self._recalc_capacity(size_to_remove)
+
+
+def get_deep_size(
+    obj: Any,
+    seen: set[int] | None = None,
+    unit: Literal["b", "kb", "mb", "gb"] = "b",
+):
+    if seen is None:
+        seen = set()
+
+    obj_id = id(obj)
+    if obj_id in seen:
+        return 0
+    seen.add(obj_id)
+    size = sys.getsizeof(obj)
+
+    if is_dataclass(obj):
+        for f in fields(obj):
+            size += get_deep_size(getattr(obj, f.name), seen)
+    elif isinstance(obj, dict):
+        size += sum(get_deep_size(v, seen) + get_deep_size(k, seen) for k, v in obj.items())
+    elif isinstance(obj, (list, tuple, set)):
+        size += sum(get_deep_size(i, seen) for i in obj)
+
+    match unit:
+        case "kb":
+            size /= 1024
+        case "mb":
+            size /= 1024 * 1024
+        case "gb":
+            size /= 1024 * 1024 * 1024
+
+    return size
+
+
+def build_chunks(
+    ngt_docs: NgtDocs,
+    num_chunks: int,
+) -> list[Chunk[NgtDoc]]:
+    sorted_docs = sorted(ngt_docs.docs, key=lambda x: x.len, reverse=True)
+
+    chunks: list[Chunk[NgtDoc]] = []
+    for _ in range(num_chunks):
+        chunks.append(Chunk(int(1e8), overfill_once=True, cap_property="len"))
+
+    for doc in sorted_docs:
+        chunks = sorted(chunks, key=lambda x: x.capacity_held)
+        chunks[0].append(doc)
+
+    return chunks
+
+
+# %%
+ngt_docs = get_all_ngt_docs(BASE_PATH)
+get_deep_size(ngt_docs, None, "mb")
+# %%
+ngt_docs.len
+# %%
+ngt_docs.total_lines
+# %%
+NUM_WORKERS = 4
+chunks = build_chunks(ngt_docs, NUM_WORKERS)
+# %%
+for c in chunks:
+    print(f"Cap hold: {c.capacity_held:<5} Cap left: {c.capacity_left:<10}")
+
+# %%
+# convert golden master
+# PRODUCT_PATH = BASE_PATH.parent
+# PRODUCT_PATH
+
+# r_paths = tuple(PRODUCT_PATH.rglob("curdata*/**/*_R.jpg"))
+
+# for r_pth in r_paths:
+#     base, _ = r_pth.stem.split("_")
+#     g_pth = r_pth.parent / (base + "_G.jpg")
+#     b_pth = r_pth.parent / (base + "_B.jpg")
+
+#     r = pyvips.Image.new_from_file(r_pth, access="sequential")
+#     g = pyvips.Image.new_from_file(g_pth, access="sequential")
+#     b = pyvips.Image.new_from_file(b_pth, access="sequential")
+#     rgb_image = r.bandjoin([g, b])  # type: ignore
+#     rgb_image = rgb_image.copy(interpretation="srgb")
+#     filename = f"{base}_RGB.png"
+#     rgb_image.write_to_file(r_pth.parent / filename)
+
+
+# %%
+def process_image_dummy(
+    package_folder: Path,
+    chunk: Chunk[NgtDoc],
+) -> None:
+    # load golden master images
+    # Package folder is the root folder of the current package.
+    # Make sure to load RGB golden master images from the correct location.
+    # These images have to be created upfront.
+    # Here, assume all images are already converted to RGB.
+    PRODUCT_PATH = package_folder.parent
+    print(PRODUCT_PATH)
+    CAM_MAPPING: dict[str, str] = {
+        "A_1": "camera1",
+        "A_2": "camera2",
+        "B_1": "camera3",
+        "B_2": "camera4",
+    }
+    orig_imgs: dict[str, pyvips.Image] = {}
+
+    for golden_master in PRODUCT_PATH.rglob("curdata*/**/*_RGB.png"):
+        cam_name = golden_master.parent.name
+        orig_imgs[cam_name] = pyvips.Image.new_from_file(golden_master)  # type: ignore
+
+    print("Orig Images: ", orig_imgs)
+
+    idx = 0
+    # A chunk consists of "NgtDoc" dataclasses which represent one NGT file each. Definition:
+    # see above. The first two lines in each doc are skipped and not contained.
+    # We are operating on a per-file basis. This ensures there are no data races when
+    # using multiple processes.
+    # iterate through all documents
+    for doc in chunk:
+        if idx == 1:  # ignore: early break condition
+            break
+        # ** load patch image (image containing the alleged errors)
+        # image-doc pairs (NGT file <-> image)
+        img = pyvips.Image.new_from_file(doc.rgb_img)
+        # identify camera ID ("A_1", "A_2", "B_1", "B_2")
+        cam_id = doc.rgb_img.parts[-3][-3:]
+        # use corresponding golden master
+        golden_master = orig_imgs[CAM_MAPPING[cam_id]]
+
+        idx += 1  # ignore: early break condition
+
+        # Each document "NgtDoc" contains its content as a collection of "NgtLine"
+        # objects (definition above as well). Each value in the line (comma separated) is
+        # accessible as property of this line object.
+        for line in doc.lines:
+            # iterate through all lines
+            break  # ignore: early break condition
+
+            # ** Pipeline steps outlined in the initial presentation by Susanne
+            # extract_values: read the coordinates (can be obtained as properties from the
+            # "line" class)
+            # find_patch: -- identify correct model (and correct cam)
+            # ** identified model needed for management of inference process
+            # extract_GM_patch: extract patch from golden master (var: golden_master)
+            # find_AOI_image_area: extract patch from error area (var: img)
+            # insert_AOI_image_area: insert the patch into the golden master
+            # (var: golden_master), but use a new reference to keep the references to
+            # the original golden masters alive
+
+            # !! Now save this image somewhere
+            # !! Caution: The images can be very large. If we process file after file
+            # !! without deleting it, we could unneccessarily fill the disk or memory.
+            # ** Recommendation: Use a shared qeue (see below) with a capacity and put
+            # ** jobs in a blocking manner to interrupt the feeder process (this function)
+            # Example:
+            # queue = mp.Queue(20) -- a queue with a capacity of 20 jobs
+            # queue.put(JOB, block=True) -- place job in queue, block if no capacity left
+
+            # // eval image
+            # should use a queue with one central inference process
+            # ?? question: Can all models be loaded at once? Is the VRAM large enough?
+            # background: We can reduce loading times if the models are loaded once at
+            # startup. We then just queue inference jobs from this worker function with
+            # an identifier for the relevant model. In the inference process a lookup is
+            # performed for this model, the reference obtained and inference started.
+            # Storage of results can be done in the inference worker or by a separate
+            # thread/process.
+            ...
+
+
+# %%
+BASE_PATH
+# %%
+process_image_dummy(BASE_PATH, chunks[0])
+# %%