Factual Accuracy: 5/5  
Completeness: 4/5  
Clarity: 4/5  
Source Quality: 4/5  

### Revision Instructions:

**Completeness (4/5):**  
- The explanation could benefit from examples of backpressure techniques used in real-world systems (e.g., specific implementations in technologies like Kafka, RabbitMQ, or other distributed systems). Including practical examples would enhance the completeness of the description.

**Clarity (4/5):**  
- Consider simplifying some technical jargon to enhance accessibility. For example, instead of saying "signaling upstream components to slow down," you might say "informing previous steps in the process to reduce the number of new requests." This would make it clearer for an audience that might not be as familiar with the specific terminology.

**Source Quality (4/5):**  
- Verify the relevance of all sources. Although they are real and provide useful information, ensure that the citations directly support the claims made in the explanation. If any sources are less authoritative or less relevant than others, consider replacing them with more reputable sources or providing additional context for their inclusion.