Real Final Sales (Real GDP minus the inventory change) increased a whopping 7.1 percent.

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Eventually, it has to change because inventory is a countable quantity and hence bound above zero.

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Other applications will monitor other types of activity such as a spike in traffic to parts of web sites or a change in inventory levels and post notifications.

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To help persuade apparel makers that the machines are worth the investment, Sunstar has started to appeal to their customers, particularly so-called fast retailers, who change their inventory as often as once a week.

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The idea behind real-time tracking is the ability to change promotions and adjust inventory on the fly to nab additional customers.

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Investors mulling retail stocks have well-established metrics to look at, among them inventory turnover (cost of sales divided by inventory), same-store-sales growth (the change in sales for stores open at least one year) and sales per square foot.

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Even though BlackBerry bulls like to tout that the initial inventory of Z10 was sold out quickly in India, Z10 will suffer in India because of the change in consumer behavior.

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