# China Golden Week Production Planning Calculator > Source: https://netray.co/tools/china-golden-week-production-capacity-calculator > Publisher: Netray (netray.co), AI and integration engineering for ERP and manufacturing systems. > Section: Free Tools ## Short answer Estimate how many units a Chinese plant can really make across the Golden Week period and how much to pre-build or order early. ## Category mes-shop-floor ## Region China ## Industry Manufacturing ## Audience - Production planner - Plant manager - Buyer sourcing from China - Supply chain planner ## Tool **Kind:** calculator **Inputs:** #### Normal daily output **Key:** daily_output **Type:** number **Default:** 2000 **Min:** 0 **Step:** 50 **Unit:** units/day **Help:** Average good units per working day on a normal day. #### Planned working days in the period **Key:** planned_days **Type:** number **Default:** 26 **Min:** 1 **Max:** 31 **Step:** 1 **Unit:** days **Help:** Working days you would have without the holiday. #### Working days lost to the holiday **Key:** lost_workdays **Type:** number **Default:** 5 **Min:** 0 **Max:** 15 **Step:** 1 **Unit:** days **Help:** Normal working days that fall inside the closure. A 7 day break often takes 5 working days after weekend swaps. #### Make-up working days **Key:** makeup_days **Type:** number **Default:** 2 **Min:** 0 **Max:** 5 **Step:** 1 **Unit:** days **Help:** Weekend days worked to swap for the holiday. #### Make-up day output vs normal **Key:** makeup_eff **Type:** slider **Default:** 85 **Min:** 40 **Max:** 110 **Step:** 5 **Unit:** % **Help:** Attendance on swapped weekend days is often lower. #### Restart ramp-up days **Key:** ramp_days **Type:** slider **Default:** 3 **Min:** 0 **Max:** 7 **Step:** 1 **Unit:** days **Help:** Days after the holiday with reduced attendance or output. #### Output during ramp-up **Key:** ramp_eff **Type:** slider **Default:** 75 **Min:** 30 **Max:** 100 **Step:** 5 **Unit:** % **Help:** Share of normal output while workers return and lines stabilise. #### Demand for the period **Key:** demand **Type:** number **Default:** 46000 **Min:** 0 **Step:** 500 **Unit:** units **Outputs:** #### Capacity without holiday **Key:** base_capacity **Expr:** daily_output * planned_days **Format:** integer #### Capacity lost to closure **Key:** lost_capacity **Expr:** daily_output * lost_workdays **Format:** integer #### Capacity regained from make-up days **Key:** makeup_gain **Expr:** daily_output * makeup_days * makeup_eff / 100 **Format:** integer #### Capacity lost during ramp-up **Key:** ramp_loss **Expr:** daily_output * ramp_days * (1 - ramp_eff / 100) **Format:** integer #### Net capacity for the period **Key:** net_capacity **Expr:** base_capacity - lost_capacity + makeup_gain - ramp_loss **Format:** integer **Primary:** true **Description:** What the plant can realistically ship in the period. #### Shortfall versus demand **Key:** shortfall **Expr:** max(0, demand - net_capacity) **Format:** integer **Primary:** true **Description:** Units to pre-build, ship early or move to another site. #### Pre-build equivalent **Key:** prebuild_days **Expr:** if(gt(daily_output,0), shortfall / daily_output, 0) **Format:** days **Description:** Days of extra normal output needed before the holiday. #### Demand coverage **Key:** coverage **Expr:** if(gt(demand,0), min(100, net_capacity / demand * 100), 0) **Format:** percent **Chart:** #### Net capacity vs restart ramp-up days **Type:** line **X:** ramp_days **From:** 0 **To:** 7 **Steps:** 8 **Series:** - net_capacity **Disclaimer:** Planning estimate only. Holiday dates and make-up working days are set each year by the State Council notice, and individual factories may close longer than the official holiday. Confirm dates and closure plans with each supplier. ## Content **Intro:** National Day Golden Week around 1 to 7 October stops or slows most Chinese factories, and the restart is often slower than the official dates suggest. This calculator turns your daily output and holiday assumptions into a net capacity figure and the pre-build you need. **Sections:** #### How to use the calculator **Body:** Enter your normal daily output and the working days you would plan for the period, usually the month. Then enter the working days lost, the make-up weekend days worked and the output on those days. Add the number of ramp-up days after the break and the output percentage during them. Enter total demand for the period and read the net capacity, shortfall and pre-build days. The chart shows how sensitive the result is to a slower restart. #### The formula **Body:** Net capacity equals normal capacity minus capacity lost to closure, plus capacity regained on make-up days, minus the loss during ramp-up. Make-up days are multiplied by their efficiency because attendance on swapped weekends is usually weaker. Ramp-up loss is days times daily output times the share of output not achieved. Shortfall is demand minus net capacity, floored at zero, and pre-build days is shortfall divided by daily output. #### Reading the result and acting on it **Body:** A shortfall means orders will slip unless you build ahead, run overtime before the break, or move volume. Share the pre-build requirement with suppliers at least six to eight weeks before the holiday, because raw material, tooling and shipping space also tighten. Add the pre-holiday export rush to freight lead time: ports and forwarders are busy before and after. Also check labor availability, since some workers do not return immediately. **Bullets:** - Confirm each supplier's actual closure start and restart dates - Fix last order dates for materials and tooling changes - Book freight early and plan for container and booking delays - Keep safety stock for the weeks after the restart #### Mistakes and ERP notes **Body:** Common errors are using the official holiday length as the supplier's, ignoring ramp-up, and forgetting the make-up days when working out net capacity. In your ERP, maintain a factory calendar for each Chinese supplier or plant so MRP lead times account for the closure. SAP factory calendars, Oracle work calendars and Infor or Epicor calendars all support this. Without calendar updates the system will promise dates that the factory cannot meet. **Cta:** If MRP is promising delivery dates inside a Chinese supplier's closure, Netray can help you review how factory calendars and lead times are set up in your ERP. **Faq:** #### How long is Golden Week? **Answer:** The National Day break is officially seven days starting around 1 October, but the exact days and the swapped weekend working days are announced by the government each year. Many factories also close earlier or return later, so ask each supplier for their own dates. #### Why model the ramp-up after the holiday? **Answer:** Not all workers return on the first day, new hires need training and lines need to be re-balanced. Even a small percentage loss over several days is a significant number of units, which is often missing from simple capacity plans. #### Does this apply to Spring Festival too? **Answer:** The same logic applies, but Spring Festival is longer and the post-holiday labor loss is typically larger. Use the dedicated Spring Festival buffer calculator for Lunar New Year and this one for October. #### How much should I pre-build? **Answer:** Use the shortfall figure as a starting point and reduce it by what the supplier can really produce with overtime before the break. Balance it against inventory cost and shelf life. Share a firm requirement early so the supplier can book materials and labor. ## Search terms golden week production planning, china national day holiday factory closure, golden week supply chain planning, china holiday capacity calculator, golden week lead time impact, china factory holiday shutdown planning, october holiday china supplier, production capacity during holiday --- Talk to an engineer: https://netray.co/contact?intent=erp_ai | Machine catalog: https://netray.co/agent/catalog.json