Analysis of Inventory
Inventory Disclosure
Norfolk Southern Corp., balance sheet: inventory
US$ in millions
| Dec 31, 2021 | Dec 31, 2020 | Dec 31, 2019 | Dec 31, 2018 | Dec 31, 2017 | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Materials and supplies | 218) | 221) | 244) | 207) | 222) |
Based on: 10-K (reporting date: 2021-12-31), 10-K (reporting date: 2020-12-31), 10-K (reporting date: 2019-12-31), 10-K (reporting date: 2018-12-31), 10-K (reporting date: 2017-12-31).
Materials and supplies inventory exhibited a non-linear trend between 2017 and 2021, characterized by moderate volatility while remaining within a relatively consistent range. The balance fluctuated between a minimum of 207 million US dollars and a maximum of 244 million US dollars, suggesting a stable baseline for operational requirements.
- Inventory Volatility (2017-2019)
- A moderate decrease was observed from 2017 to 2018, followed by a significant increase in 2019. During this period, materials and supplies reached a five-year peak of 244 million US dollars, representing the highest inventory level in the analyzed timeframe.
- Correction and Stabilization (2020-2021)
- Following the 2019 peak, a downward correction occurred in 2020, with levels returning to 221 million US dollars. This decline was followed by a slight further reduction to 218 million US dollars by the end of 2021, indicating a return to levels similar to those seen at the beginning of the period.
- Long-term Variance Analysis
- The overall variance between the lowest and highest reported values was 37 million US dollars. The return to 218 million US dollars in 2021, compared to 222 million US dollars in 2017, demonstrates a lack of a sustained upward or downward long-term trend, pointing instead toward a cyclical or steady-state inventory management pattern.
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