Merge pull request #1080 from AndreiPanko/patch-17

Update Dampener Period planning parameter

Author: edupont04

business-central/design-details-planning-parameters.md

@@ -9,7 +9,7 @@
     ms.tgt_pltfrm: na
     ms.workload: na
     ms.search.keywords: planning, design
-    ms.date: 04/01/2020
+    ms.date: 04/20/2020
     ms.author: sgroespe
 
 ---
@@ -71,8 +71,10 @@ To obtain a rational supply plan, a planner will fine-tune planning parameters t
 |Field|Description|  
 |---------------------------------|---------------------------------------|  
 |**Rescheduling Period**|This field is used to determine whether the action message should reschedule an existing order or cancel it and create a new order. The existing order will be rescheduled within one rescheduling period before the current supply and until one rescheduling period after the current supply.|  
-|**Lot Accumulation Period**|With reordering policy Lot-for-Lot, this field is used to accumulate multiple supply needs into one supply order. From the first planned supply, the system accumulates all supply needs in the following lot accumulation period into one supply, which is placed on the date of the first supply. Demand outside the lot accumulation period is not covered by this supply.|  
+|**Lot Accumulation Period**|With the reordering policy Lot-for-Lot, this field is used to accumulate multiple supply needs into one supply order. From the first planned supply, the system accumulates all supply needs in the following lot accumulation period into one supply, which is placed on the date of the first supply. Demand outside the lot accumulation period is not covered by this supply.|  
 |**Dampener Period**|This field is used to avoid minor rescheduling of existing supply out in time. Changes from the supply date until one dampener period from the supply date will not generate any action messages.<br /><br /> The dampener period specifies a period of time during which you do not want the planning system to propose to reschedule existing supply orders forward. This limits the number of insignificant rescheduling of existing supply to a later date if the rescheduled date is within the dampener period.<br /><br /> As a result, a positive delta between the suggested new supply date and the original supply date will always be larger than the dampener period.|  
+> [!NOTE]
+> With the reordering policy Lot-for-Lot, the value of the **Lot Accumulation Period** field must be equal to or larger than the value of the **Dampener Period** field. Otherwise, the dampener period will be automatically reduced during the planning routine to match the lot accumulation period.  
 
 The timing of rescheduling period, dampener period, and lot accumulation period is based on a supply date. The time bucket is based on the planning start date, as shown in the following illustration.  
 

business-central/setup-best-practices-global-planning-setup.md

@@ -24,7 +24,7 @@ The **Planning** FastTab on the **Manufacturing Setup** page contains several fi
 |Components at Location|If items are not defined as SKUs, select the location code of your main warehouse.|This also applies if you only use the requisition worksheet.|  
 |Blank Overflow Level|Select **Allow Default Calculation** if you are migrating from Microsoft Dynamics NAV 5.0 or earlier.|Use only if you want to allow all or some of your items to overflow the reorder point.|  
 |Default Dampener Period|Set between 1D and 5D.<br /><br /> If new to planning in [!INCLUDE[d365fin](includes/d365fin_md.md)], then set a longer period.|When users are more familiar with the different reasons for action messages, then shorten the dampener period to allow more change suggestions.|  
-|Default Dampener Quantity|Set between 5 and 20 percent of the item’s lot size.||  
+|Default Dampener Quantity %|Set between 5 and 20 percent of the item’s lot size.||  
 
 ## See Also  
  [Setup Best Practices: Supply Planning](setup-best-practices-supply-planning.md)   

business-central/setup-best-practices-planning-parameters.md

@@ -22,7 +22,7 @@ The **Planning** FastTab on the item card is the center of a company’s supply
 |-----------------|-------------------|-------------|  
 |Reordering Policy||For more information, see [Setup Best Practices: Reordering Policies](setup-best-practices-reordering-policies.md).|  
 |Reserve|Select **Never** when the item is planned using a reorder point.<br /><br /> In manufacturing, select **Never** to allow the planning system to cover all demands.<br /><br /> Select **Optional** for items that you may want to reserve for top-priority customers.<br /><br /> Select **Always** for non-unique items, such as items of type miscellaneous that are inbound for specific demands.|Reservations generally counteract the purpose of planning, which is to balance demand and supply. Therefore, items that are set up for planning should generally not be reserved.<br /><br /> If the user reserves an inventory quantity for future demand, then the planning foundation will be disturbed, and the reorder point may not work correctly. Even if the projected inventory level is acceptable with regard to the reorder point, the quantities may not be available because of the reservation.|  
-|Dampener Period|Set with regard to the supplier’s flexibility.<br /><br /> A longer period enables you to provide better customer service, but will also cause more rescheduling actions.|If the supplier accepts last-minute changes to orders, then use a longer period, but be prepared for more rescheduling actions. If the supplier requires firm planning, then shorten the period as much as possible.<br /><br /> For information about the **Dampener Period** field , see [Design Details: Planning Parameters](design-details-planning-parameters.md).|  
+|Dampener Period|Set with regard to the supplier’s flexibility.<br /><br /> A shorter period enables you to reduce working capital by avoiding excessive stock, but will also cause more rescheduling actions.|If the supplier accepts last-minute changes to orders, then use a shorter period, but be prepared for more rescheduling actions. If the supplier requires firm planning, then extend the period as much as possible.<br /><br /> For information about the **Dampener Period** field , see [Design Details: Planning Parameters](design-details-planning-parameters.md).|  
 |Include Inventory|Always select when you are using the Lot-for-Lot reordering policy.|Do not select only in special situations, such as when inventory items are not sellable.|  
 |Safety Lead Time|Set between 1D and 6D.<br /><br /> Set a safety lead time of at least one day to make sure that supplies are available on the day before they are needed.<br /><br /> If using a new supplier, define a longer time until their delivery performance is known.<br /><br /> In manufacturing, define longer safety lead times for critical components.|Supply that is planned by the system to avoid a stock-out will arrive on the same day that the stock-out occurs. This may be several hours too late if, for example, the demand is needed in the morning and the supply arrives in the afternoon. **Note:**  The **Safety Lead Time** field uses the base calendar. Therefore, 14D is not necessarily two weeks.|  
 |Safety Stock Quantity|Use for items with large demand fluctuations.<br /><br /> In manufacturing, use for critical components.<br /><br /> Use for items that are subject to service agreements.|If the **Reorder Point** field is not filled, then the safety stock quantity also functions as a reorder point.|