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Overview of Lock-Off Units (Multiple Rental Combinations)

Updated: 7/11/2006 -  Article ID#: F000078

RDP has long supported lock-off units, which are used when renting a unit in more than one configuration, such as a four bedroom house that can be rented as four singles, a triple with a single, etc.  While there is a great deal of flexibility in the lock-off design, it is not possible to have unlimited lock-off combinations.  This document defines the limits and rules of the RDP lock-off system.

Lock-Off Rules

A lock-off unit is comprised of a master unit and one or more additional units.  All units must be of one of the following types:

Lock-Off Type Description Unit Value Explanation
M Master 0 Each lock-off unit must have one master unit of lock-off type "M" assigned.
L Mid-Level Lock-Off 0 Lock-off units may have one or more mid-level units. Mid-level lock-off units are optional.
S Sub-Level (lowest) 1 Each lock-off unit must have at least one sub-level unit.

Rules for Maximum Lock-Offs in RDP200 Units

The lock-off structure is first defined for unit types using the RDP090 option, updating the LZ table.  Each unit number is defined from Menu 11, using Option 200 or 202.  When entering a given unit number the system allows for the entry of the "lock-off type" and then up to four "lock-off unit numbers", labeled #1, #2, #3, and #4.  I rules for the entry of lock-off room numbers are as follows:

Lock-Off Type Unit Value Rules for entering Unit Numbers of this type
Master (M) 0
  1. Each lock-off combination must start with a master unit number of lock-off type "M".
  2. All Mid-Level lock-off unit numbers must be entered in the four lock-off fields on the master
  3. All Sub-units that are not part of any of any mid-level lock-off must also be entered in the four lock-off fields on the master.
  4. A master lock-off can never lock-off another master.
Mid-Level (L) 0
  1. Mid-level lock-offs are optional
  2. The master unit number must be entered in one of the four lock-off entry fields
  3. Mid-level unit numbers must also lock off all sub-units that are part of the mid-level lock-off using the remaining three lock-off fields.
  4. A mid-level lock-off can never lock another mid-level lock-off.
Sub-Units (S) 1
  1. At least one sub-unit is required
  2. The master unit number must be entered in one of the four lock-off entry fields
  3. Sub-Units must also lock-off all mid-level lock-offs they are part of, using the remaining three lock-off fields.
  4. A sub-unit can never lock another mid-level lock-off.

Lock-off Example - Room Combinations, Room Value & Occupancy Statistics

Lock-offs have a "room value" that is defined by the number of sub-units in the master, and also one room number for each rental combination.  As an example lets look at a four-bedroom house that can be rented many different ways. In this example, there are seven combinations of renting the four individual rooms.  The system will have seven room numbers (combinations), but a total room value of 4 for occupancy statistics.

A B C D

Unit # Unit Type Made Up Of Lock-Off Type Room
Value
Description
103M QUAD A, B, C, D M-Master 4 One person may rent the entire house as a "four bedroom"
103ABC TRIPLE A, B, C L-Mid-Level 3 One person can rent "ABC" as a triple, while another person rents "D" as a single
103CD DOUBLE C,D L-Mid-Level 2 One person can rent CD as a double, while another person rents "A" as a single and a third person rents "B" as a single
103A S1 A S-Sub-Unit 1 Four different people may rent the individual units A, B, C, D, as "singles".
103B S2 B S-Sub-Unit 1 Four different people may rent the individual units A, B, C, D, as "singles".
103C S3 C S-Sub-Unit 1 Four different people may rent the individual units A, B, C, D, as "singles".
103D S4 D S-Sub-Unit 1 Four different people may rent the individual units A, B, C, D, as "singles".

Creating a Lock-off Unit in RDP

The process of creating a lock-off unit in the RDP system is as follows:

  1. Define Unit Types in Table C2
  2. Define Lock-off Unit TYPE Structure in Table LZ
  3. Define Lock-off Unit NUMBER Structure in RDP200

Each of these steps is explained below.

Define Unit Types in Table C2

To create this sample lock-off unit, the first step is to use RDP090 to define the unit types in Table C2.  The unit types are entered normally, with no special requirements for lock-offs.

Define Lock-off Unit TYPE Structure in Table LZ

RDP allows reservations to lock-off unit TYPES, without a unit number being assigned (inventory reservations).  For example, you may have 10 QUAD units that all follow the structure in this example.  An inventory reservation can be made to a QUAD unit, and this reservation would reduce the number of QUAD units from 10 to 9 for the duration of that reservation.  When this inventory reservation was made for the unit type QUAD, the system would also reduce the number of available units by one for types S1, S2, S3, S4, ABC, and CD.

The room type lock-off structure has to be entered into Table LZ using the RDP090 program.  The structure in this example would be entered as follows:

Note: The Unit Type column is entered as the sub-record in RDP090, Table LZ.

Unit Type Lock-Off Type Lock-Off 1 Lock-Off 2 Lock-Off 3 Lock-Off 4
QUAD Master TRIPLE DOUBLE    
TRIPLE Mid-Level QUAD S1 S2 S3
DOUBLE Mid-Level QUAD S3 S4  
S1 Sub-Unit QUAD TRIPLE    
S2 Sub-Unit QUAD TRIPLE    
S3 Sub-Unit QUAD TRIPLE DOUBLE  
S4 Sub-Unit QUAD DOUBLE    

Define Lock-off Unit NUMBER Structure in Options 200/202

RDP also allows reservations to specific unit numbers (pre-assigned reservations, owner reservations, etc.). In this example, when Unit Number ABCD (the master) is rented, the system also makes Units A, B, C, D, ABC, and CD unavailable.  The unit's lock-off structure has to be entered from Menu 11, Options 200/202.

Note: To create the example unit, seven different unit numbers and seven different unit types are used as follows:

Unit #

Unit Type

Lock-Off Type

Unit Value

Lock-Off 1

Lock-Off 2

Lock-Off 3

Lock-Off 4

103M

QUAD

Master

0

103ABC

103CD

 

 

103ABC

TRIPLE

Mid-Level

0

103M

103A

103B

103C

103CD

DOUBLE

Mid-Level

0

103M

103C

103D

 

103A

S1

Sub-Unit

1

103M

103ABC

 

 

103B

S2

Sub-Unit

1

103M

103ABC

 

 

103C

S3

Sub-Unit

1

103M

103ABC

103CD

 

103D

S4

Sub-Unit

1

103M

103CD

 

 


Note:  Notice that unit ABC, the mid-level triple, has a lock-off chain of ABCD and A, B, C.  When making a reservation for Unit ABC the system will make Unit CD unavailable as well because Unit C is a unit that is common to both Unit ABC (the TRIPLE) and Unit CD (the DOUBLE).

Housekeeping Issues with Lock-off units

The RDP housekeeping system works as follows with lock-off units:

Action when Changing from Clean to Dirty

When a room number is changed from clean to dirty the following logic is applied to lock-off units.

Lock-off Type Action when Changing from Clean to Dirty
M-Master When marking a master as dirty all mid-levels and all sub-units will be marked as dirty
L-Mid-level When marking a mid-level as dirty all sub-units and the master will be marked as dirty
S-Sub-unit When marking a sub-unit as dirty all mid-levels that the sub-unit is a component of and the master will be marked as dirty

Action when Changing from Dirty to Clean

When a room number is changed from dirty to clean the following logic is applied to lock-off units.

Lock-off Type Action when Changing from Dirty to Clean
M-Master When marking a master as clean, all the sub-units and mid-levels will be marked as clean
L-Mid-level When marking a mid-Level as clean, all the sub-units will be marked as clean.  If all other sub-units and mid-level lock-offs are already in a clean state, then the master will be marked as clean.
S-Sub-unit When marking a sub-unit as clean, if all the other sub-units of its mid-level lock-off or master are already in a clean state then the mid-level lock-off or master lock-off is also marked as clean.

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