Based on the material finds it is possible to compare sites and regions and create a cultural-chronological horizon.
In some cases today scholars are comparing radiocarbon dates, even before publishing the finds.
When it comes to Bible chronology the difference between a “high” and “low” chronology is a matter of mere decades not centuries. Other opinions place the transition somewhere between the two—in about 950 B. The date is important because the date you choose will determine whether David and Solomon reigned in the archaeologically poor and archaeologically poorly documented Iron I or in the comparatively rich and richly documented Iron IIa.
Singer-Avitz claims the material evidence of archaeological stratigraphy, including pottery finds, should not take second place. A useful tool but only one and not the only when it comes to determining Bible chronology. According to the low chronology, the transition to Iron Age IIa occurred around 920–900 B. However, the differences in data between the various schools are not dramatically far apart. In an attempt to solve this chronological problem and to achieve a more accurate date for the transition period, many scholars have resorted to carbon-14 (or radiocarbon) analysis, which can be performed on any organic substance, like wood or grain.
The date of the transition from the archaeological period known as Iron Age I to Iron Age IIa is a particularly hotly disputed topic, especially because the date of the transition is crucial for elucidating the history and material culture of the reigns of David and Solomon. It is generally recognized that David conquered Jerusalem in about 1000 B. Radio-carbon dating is regarded by many scholars as accurate, precise and scientific, in contrast to the old cultural-historical methods of dating archaeological strata, which the devotees of radiocarbon regard as inaccurate and intuitive.
But the absolute date after calibration depends on which calibration formula is used. This uncertainty ranges from 20 years (for high-precision dating) through intermediate values of 50–100 years, and in some cases up to 100–150 years. For interpreting the results, different statistical models are used by different researchers.
The results, depending on the calibration, can be quite different. Naturally, different statistical models for interpretation of the same data will produce different results. After processing the data with all these scientific tools, most archaeologists “improve” the given dates in accordance with broader archaeological and historical considerations.
Based on the very same data, but employing different statistical methods, the various schools have reached quite diverse conclusions.