1. Value of Production Index (VaPI)

The seasonally adjusted VaPI for total manufacturing further declined in September 2024 at a monthly rate of 4.4 percent from the 1.0 percent monthly decline observed in August 2024. (Figure 1a, and Tables A and 1)

In contrast, the seasonally adjusted VaPI for food manufacturing increased in September 2024 at a monthly rate of 3.2 percent from the 7.5 percent monthly drop observed in August 2024. (Figure 1b, and Tables A and 1)

Furthermore, the seasonally adjusted VaPI of industry divisions other than the manufacture of food are shown in Table 1a.

2. Volume of Production Index (VoPI)

The monthly rate of the seasonally adjusted VoPI for total manufacturing further decreased to 3.6 percent in September 2024. In August 2024, a 0.9 percent month-on-month decrement was observed. (Figure 2a, and Tables A and 2)

On the other hand, the monthly rate of the seasonally adjusted VoPI for food manufacturing increased by 1.3 percent this month from its monthly decline of 7.6 percent in August 2024. (Figure 2b, and Tables A and 2)

In addition, the seasonally adjusted VoPI of industry divisions other than the manufacture of food are shown in Table 2a.

3. Value of Net Sales Index (VaNSI)

In September 2024, the monthly rate of the seasonally adjusted VaNSI for total manufacturing decreased by 4.9 percent from the 2.0 percent increment in August 2024. (Figure 3a, and Tables A and 3)

Likewise, a monthly downturn of 2.7 percent was observed in the seasonally adjusted VaNSI for food manufacturing during the month from a growth rate of 0.6 percent month-on-month in August 2024. (Figure 3b, and Tables A and 3)

Furthermore, the seasonally adjusted VaNSI of industry divisions other than the manufacture of food are shown in Table 3a.

4. Volume of Net Sales Index (VoNSI)

Month-on-month, the seasonally adjusted VoNSI for total manufacturing had a decrease of 3.5 percent in September 2024 from a 0.9 percent monthly growth rate observed in August 2024. (Figure 4a, and Tables A and 4)

Likewise, the monthly rate of the seasonally adjusted VoNSI for food manufacturing decreased by 3.4 percent in September 2024 from a 0.1 percent month-on-month uptick in the previous month. (Figure 4b, and Tables A and 4)

Moreover, the seasonally adjusted VoNSI of industry divisions other than the manufacture of food are shown in Table 4a.

CLAIRE DENNIS S. MAPA, PhD                
Undersecretary                
National Statistician and Civil Registrar General

See more at the Seasonally Adjusted Production Index and Net Sales Index (Monthly Integrated Survey of Selected Industries) landing page.

Technical Notes

The Monthly Integrated Survey of Selected Industries (MISSI) generates the original series of the Value of Production Index (VaPI), Volume of Production Index (VoPI), Value of Net Sales Index (VaNSI), and Volume of Net Sales Index (VoNSI). These indices provide information on the performance of growth-oriented industries in the manufacturing sector.

This special release features the seasonally adjusted VaPI, VoPI, VaNSI, and VoNSI using X-13 Auto-Regressive Integrated Moving Average (ARIMA) of JDemetra+. The seasonally adjusted series show the trend of value and volume of production and net sales of the manufacturing sector without the effects of seasonal factors.

The decomposition model chosen for the seasonal adjustment for each index is shown below.